2005-2010 Mercedes B Class SUV On-board computer and displays User Manual
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On-board computer and displays for Your Mercedes B Class SUV First Generation (2005-2010)

Useful information ............................ 188
Important safety notes .................... 188
Displays and operation .................... 188
Menus and submenus ...................... 192
Display messages ............................. 205
Warning and indicator lamps in the
instrument cluster ............................ 231
187
On-board computer and displays
Useful information
i
This Owner's Manual describes all models
and all standard and optional equipment
available to your vehicle at the time of pub-
lication of the Owner's Manual. Country-
specific deviations are possible. Please
note that your vehicle may not be equipped
with all features described. This also
applies to safety-relevantsystems and
functions.
i
Please read the information on qualified
specialist workshops (Y page 22).
Important safety notes
G
WARNING
Only use the on-board computer when road
and traffic conditions permit.You would oth-
erwise be distracted and unable to concen-
trate properly on driving, and could cause an
accident.
G
WARNING
No messages will be displayed if either the
instrument cluster or the multifunction dis-
play is inoperative.
As a result, you will not be able to see infor-
mation about your driving conditions, such as
speed, outside temperature, warning and indi-
cator lamps, display messages or system fail-
ures. Driving characteristics may be impaired.
Adjust your driving style and vehicle speed
accordingly.
Contact a qualified specialist workshop
immediately.
G
WARNING
The on-board computer only records and dis-
plays malfunctions and warnings from certain
systems. For this reason, you should always
make sure that your vehicle is safe to use. You
could otherwise cause an accident by driving
an unsafe vehicle.
G
WARNING
The operating safety of your vehicle could be
affected if maintenance work is carried out
incorrectly. You could lose control of the vehi-
cle and cause an accident.The safety systems
may also no longer be able to protect you or
others as they are designed to do.
Always have maintenance work carried out at
a qualified specialist workshop.
You will find an illustration of the instrument
cluster in the "At a glance" section
(Y page 28).
Displays and operation
Coolant temperature gauge
The coolant temperature gauge is in the
instrumentclusteronthe right-hand side.
The reading may rise up to 120 †undernor-
mal driving conditions if the coolant has been
filled correctly.
At high outside temperatures and when driv-
ing uphill, the coolant temperature may rise
to the end of the scale.
Rev counter
!
Do not drive in the overrevving range.
Doing so will damage the engine.
The red band in the rev counter indicates the
engine's overrevving range.
The fuel supply is interrupted to protectthe
engine when the red band is reached.
Outside temperature display
G
WARNING
At temperatures just above freezing point, the
street may be icy, especially in wooded areas
or on bridges. If you do not adapt your driving
style to the conditions, the vehicle could skid.
For this reason, adapt your driving style and
speed to the weather conditions.
188
Displays and operation
On-board computer and displays
The outside temperature display is in the mul-
tifunction display.
Changes in the outside temperature are dis-
played after a short delay.
Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
Cruise control (Y page 149) activated:
The segments light up from the stored speed
to the maximum speed.
Variable SPEEDTRONIC (Y page 151) activa-
ted:
The segments light up from the start of the
scale to the selected limit speed.
DISTRONIC PLUS (Y page 154) activated:
One or two segments in the set speed range
light up.
DISTRONIC PLUS detects a vehicle in front:
The segments between the speed of the vehi-
cle in frontand the stored speed light up.
Operating the on-board computer
Overview
:
Multifunctiondisplay
;
Switches on LINGUATRONIC; see the sep-
arate operating instructions
=
Right control panel
?
Left control panel
A
Back button
X
To activatethe on-board computer: turn
the key to position 1 in the ignition lock.
You can control the multifunction display and
the settings in the on-board computer using
the buttons on the multifunction steering
wheel.
Displays and operation
189
On-board computer and displays
Z
Left control panel
=
;
R
Calls up the menu and menu bar
9
:
Press briefly:
R
Scrolls through lists
R
Selects a submenu or function
R
In the
Audio menu: selects a
stored station, an audio track or
a video scene
R
In the
Tel (telephone) menu:
switches to the phone book and
selects a name or telephone
number
9
:
Press and hold:
R
In the
Audio menu: selects the
previous/nextstation or selects
an audio track or a video scene
using rapid scrolling
R
In the
Tel
(telephone) menu:
starts rapid scrolling through the
phone book
a
R
Confirms selection/display mes-
sage
R
In the
Tel (telephone) menu:
switches to the telephone book
and starts dialling the selected
number
R
In the
Audio menu: stops the
station search function at the
desired station
Right control panel
~
R
Rejects or ends a call
R
Exits telephone book/redial
memory
6
R
Makes or accepts a call
R
Switches to the redial memory
W
X
R
Adjusts the volume
8
R
Mute
Back button
%
Press briefly:
R
Back
R
Switches off LINGUATRONIC;
see the separate operating
instructions
R
Hides display messages/calls
up the last
Trip menu function
used
R
Exits the telephone book/redial
memory
%
Press and hold:
R
Calls up the standard display in
the
Trip menu
Multifunction display
Example: automatic transmission multifunction
display
:
Time
;
Outside temperature or speed
(Y page 201)
=
Description field
190
Displays and operation
On-board computer and displays
?
Menu bar
A
Drive program
B
Transmission position
X
To show menu bar ?: press the =
or ; button on the steering wheel.
Menu bar ? is hidden after a few seconds.
Text field = shows the selected menu or
submenu as well as display messages.
i
You can set the time using Audio 20 or
COMAND Online, see the separate Operat-
ing Instructions.
The following messages can appearinthe
multifunction display:
Z
Shift recommendation
(Y page 134)
XjY Active Parking Assist
(Y page 166)
¯
Cruise control (Y page 149)
LIM
SPEEDTRONIC (Y page 151)
è
Rear window wiper
(Y page 109)
_
Adaptive Highbeam Assist
(Y page 101)
À
ATTENTION ASSIST
(Y page 175)
¤
ECO start/stop function
(Y page 129)
Ä
Speed Limit Assist
(Y page 176)
Ã
Lane Keeping Assist
(Y page 180)
ë
HOLD function (Y page 162)
Ä
Distance warning signal
(Y page 63)
120 km/h!
Maximum permissible speed
exceeded (only for certain coun-
tries)
Displays and operation
191
On-board computer and displays
Z
Menus and submenus
Menu overview
Function
:
Trip menu (Y page 193)
;
Navi menu (navigationinstructions) (Y page 194)
=
Audio menu (Y page 195)
?
Tel menu (telephone) (Y page 196)
A
Assist. menu (assistance) (Y page 198)
B
Service menu (Y page 200)
R
calls up display messages (Y page 205)
R
tyre pressure loss warning (Y page 297)
R
ASSYST PLUS service interval display (Y page 266)
C
Settings menu (Y page 200)
The numberofmenus shown depends on the optional equipment in the vehicle.
The
Audio, Navi and Tel menus differ slightly in vehicles with Audio 20 and in vehicles with
COMAND Online. The examples given in this Owner's Manual apply to vehicles equipped with
COMAND Online.
192
Menus and submenus
On-board computer and displays
Trip menu
Standard display
X
Press and hold the % button on the
steering wheel until the
Trip menu with
trip meter : and total distance
recorder ; is shown.
Trip computer "From start" or "From
reset"
Example: "From start" trip computer
:
Distance
;
Time
=
Average speed
?
Average fuel consumption
X
Press the = or ; button on the steer-
ing wheel to select the
Trip
menu.
X
Press the 9 or : button to select
From start or From reset.
The values in the
From start submenu are
calculated fromthe start of a journey whilst
the values in the
From reset
submenu are
calculated from the last time the submenu
was reset (Y page 194).
The
From start trip computer is automati-
cally reset when:
R
the ignition has been switched off for more
than four hours.
R
999 hours have been exceeded.
R
9,999 kilometres have been exceeded.
The
From reset
trip computer is automati-
cally reset if the value exceeds 9,999 hours
or 99,999 kilometres.
Displaying the range and current fuel
consumption
:
Approximate range
;
Current fuel consumption
X
Press the = or ; button on the steer-
ing wheel to select the
Trip menu.
X
Press the 9 or : button to select
current fuel consumption ; and approxi-
mate range :.
Approximate range : is calculated accord-
ing to the current driving style and the amount
of fuel in the tank. If there is only a small
amount of fuel left in the fuel tank, the display
shows a vehicle being refuelled C instead
of range :.
Digital speedometer
:
Shift recommendation
;
Digital speedometer
X
Press the = or ; button on the steer-
ing wheel to select the
Trip menu.
X
Press the 9 or : button to select
digital speedometer ;.
For further information on gearshift recom-
mendations, see (Y page 134).
Menus and submenus
193
On-board computer and displays
Z
i
If the gearshift recommendation is shown
in the multifunction display, it is not shown
in the status bar.
Resets values
Example: resetting the trip computer "From start"
You can reset the values of the following func-
tions:
R
trip meter
R
trip computer "From start"
R
trip computer "From reset"
X
Press the = or ; button on the steer-
ing wheel to select the
Trip
menu.
X
Press the 9 or : button to select the
function that you wish to reset.
X
Press a.
X
Press the : button to select
Yes
and
press the a button to confirm.
Navigation menu
Displaying navigation instructions
X
Switch on Audio 20 with Becker
®
MAP
PILOT or COMAND Online (see the sepa-
rate operating instructions).
X
Press the = or ; button on the steer-
ing wheel to select the
Navi menu.
In the
Navi menu, the multifunction display
shows navigation instructions. For more
information, see the separate operating
instructions.
Route guidance not active
:
Direction of travel
;
Current street
Activated route guidance
No change of direction announced
:
Distance to the destination
;
Distance to the next change of direction
=
Current street
?
Symbol "follow the road's course"
Change of direction announced without a
lane recommendation
:
Road to which the change of direction
leads
;
Distance to change of direction and visual
distance display
=
Change-of-direction icon
When a change of direction has been
announced, you will see visualdistance dis-
play ; next to the symbol for change of
direction =.This shortens from the bottom
194
Menus and submenus
On-board computer and displays
to the top of the display as you approach the
point of the announced change of direction.
Change of direction announced with a
lane recommendation
:
Road to which the change of direction
leads
;
Distance to change of directionand visual
distance display
=
Lane recommendation
?
New lane during a change of direction
A
Lane continues through change of direc-
tion
B
Change-of-direction icon
On multi-lane roads, lane recommendation
= may be shown for the next change of
direction. During the change of direction,
additional lanes may be displayed.
Lane recommendations are only displayed if
the relevant data is availableonthe digital
map.
Other status indicators of the naviga-
tion system
R
O:you have reached the destination or an
intermediate destination.
R
New route... or Calculating route:
calculating a new route
R
Off map or Off road:the vehicle position
is outside the area of the digital map (off-
map position).
R
No route
:no route could be calculated to
the selected destination.
Audio menu
Selecting aradio station
:
Waveband
;
Channel frequency with memory position
i
The memory position is only displayed
along with station ; if this has been
stored.
X
Switch on Audio 20 or COMAND Online
(see the separate operating instructions)
and select Radio.
X
Press the = or ; button on the steer-
ing wheel to select the
Audio
menu.
X
To selectastoredstation: briefly press
the 9 or : button.
X
To select a station from the station
list: press and briefly hold the 9
or : button.
If no stationlist is received:
X
To select astation using the station
search: press and briefly hold the 9
or : button.
i
For information on changing waveband
and storing stations, see the separate oper-
ating instructions.
i
DAB radio mode (Digital Audio Broadcast-
ing); see the separate operating instruc-
tions.
Menus and submenus
195
On-board computer and displays
Z
Audio player or audio media operation
Example: CD changer display
:
Current CD in the CD changer
;
Current track
Audio data from various audio devices or
media can be played, depending on the equip-
ment fitted in the vehicle.
X
Switch on Audio 20 or COMAND Online and
select the audio device or medium (see the
separate operating instructions).
X
Press the = or ; buttononthe steer-
ing wheel to select the
Audio
menu.
X
To selectthe next/previous track:
briefly press the 9 or : button.
X
To select a track from the track list
(rapid scrolling): press and hold the
9 or : button until desired
track ; has been reached.
If you press and hold the 9 or : but-
ton, the rapid scrolling speed is increased.
Not all audio devices or media support this
function.
If track information is stored on the audio
device or medium, the multifunction display
will show the numberand title of the track.
The current trackdoes not appear in audio
AUX mode (Auxiliary audio mode: external
audio source connected).
Video DVD operation
Example: DVD changer display
:
Current DVD in the DVD changer
;
Current scene
X
Switch on COMAND Online and select
video DVD (see the separate operating
instructions).
X
Press the = or ; button on the steer-
ing wheel to select the
Audio
menu.
X
To select the next or previous scene:
briefly press the 9 or : button.
X
To select ascene from the scene list
(rapid scrolling): press and hold the
9 or : buttonuntil desired
scene ; has been reached.
Telephone menu
Introduction
G
WARNING
Observe the legal requirements of the country
in which you are currently driving regarding
the use of mobile phones in the vehicle.
If it is permitted to use mobile phones while
the vehicle is in motion, you should only use
them when the road and traffic conditions
allow. Otherwise, you may be distracted from
the traffic conditions, cause an accident and
injure yourselfand others.
X
Switch on the mobile phone and Audio 20
or COMAND Online (see the separate oper-
ating instructions).
X
Place a mobile phone in the mobile phone
bracket (Y page 258) or establishaBlue-
tooth
®
connection with Audio 20 or
196
Menus and submenus
On-board computer and displays
COMAND Online (see the separate operat-
ing instructions).
X
Press the = or ; buttononthe steer-
ing wheel to select the
Tel menu.
You will see one of the following display mes-
sages in the multifunction display:
R
Please enter PIN:the mobile phone has
been placed in the mobile phone bracket
and the PIN has not been entered.
When you enter your PIN via the mobile
phone, LINGUATRONIC, Audio 20 or
COMAND Online, the mobile phone
searches for a network.
R
Telephone ready
or the name of the net-
work provider: the mobile phone has found
a network and is ready to receive.
R
Telephone No service: there is no net-
work available or the mobile phone is
searching for a network.
i You can obtain further information about
suitable mobile phones and connecting
mobile phones via Bluetooth
®
:
R
in any Mercedes Benz Service Centre
R
on the Internet at
Accepting acall
Example: incoming call
X
Press the 6 button on the steering
wheel to acceptanincoming call.
If someone calls you when you are in the
Tel menu, a display message appears in the
multifunctiondisplay.
You can accept a call even if you are not in
the Tel
menu.
Rejecting or ending acall
X
Press the ~ button on the steering
wheel.
You can end or reject a call even if you are not
in the
Tel menu.
Dialling anumber from the phone book
X
Press the = or ; button on the steer-
ing wheel to select the
Tel menu.
X
Press the 9, : or a button to call
up the phone book.
X
Press the 9 or : button to select the
desired name.
To start scrolling rapidly,press and hold the
9 or : button for longer than one
second.
Rapid scrolling stops when you release the
button or reach the end of the list.
X
If onlyone telephone number is stored
for a name: press the 6 or a button
to start dialling.
or
X
If there is more than one number for a
particular name: press the 6 or a
button to display the numbers.
X
Press the 9 or : button to select the
number you want to dial.
X
Press the 6 or a button to start dial-
ling.
or
X
If you do not want to make a call: press
the ~ or % button.
Redialling
The on-board computer saves the last names
or numbers dialled in the redial memory.
X
Press the = or ; button on the steer-
ing wheel to select the
Tel menu.
X
Press the 6 button to switch to the
redial memory.
X
Press the 9 or : button to select the
desired name or number.
Menus and submenus
197
On-board computer and displays
Z
X
Press the 6 or a button to start dial-
ling.
or
X
If you do not want to make a call: press
the ~ or % button.
Assistance menu
Introduction
In the Assist. menu, you have the following
options:
R
show Speed Limit Assist and activate/
deactivate its message function
R
show distance display
R
activate/deactivate ESP
®
R
activate/deactivate the distance warning
signal
R
activate/deactivate ATTENTION ASSIST
R
activate/deactivate Blind Spot Assist
R
activate/deactivate Lane Keeping Assist
Speed Limit Assist
Displaying Speed Limit Assist
X
Press the = or ; button on the steer-
ing wheel to select the
Assist.
menu.
X
Press the 9 or : button to select
Speed Lim. Asst..
X
Press a.
Under certain conditions (Y page 176),
detected speed limits are shown in the mul-
tifunction display.
Activating/deactivating the Speed Limit
Assist message function
X
Press the = or ; button on the steer-
ing wheel to select the
Assist. menu.
X
Press the 9 or : button to select
Speed Lim. Asst..
X
Press the a button.
The multifunction display shows Speed
Limit Assist.
X
Press the : button.
The currentselection is displayed.
X
To activate or deactivate: press a.
If the Speed Limit Assist message function
is activated, a detected speed limit is auto-
matically displayed for five seconds. Other
items in the multifunction display are not
shown during this time.
If Speed Limit Assist is operational and the
message function is activated, the multifunc-
tion display shows the Ä symbol when the
ignition is switched on.
Showing the distance display
X
Press the = or ; button on the steer-
ing wheel to select the
Assist. menu.
X
Press the 9 or : button to select
Distance display.
X
Press a.
The DISTRONIC PLUS distance display
appears in the multifunction display
(Y page 157).
Deactivating/activating ESP
®
G
WARNING
If the ÷ warning lamp in the instrument
cluster flashes, proceed as follows:
R
Under no circumstances should you deac-
tivate ESP
®
.
R
When pulling away, only depress the accel-
erator pedal as far as is necessary.
R
Adapt your driving style to the prevailing
road and weather conditions.
198
Menus and submenus
On-board computer and displays
The vehicle may otherwise begin to skid.
If you drive too fast, ESP
®
cannot reduce the
risk of an accident. ESP
®
cannot override the
laws of physics.
G
WARNING
If the å warning lamp in the instrument
cluster lights up when the engine is running,
ESP
®
is deactivated or is unavailable due to a
malfunction. The risk that your vehicle may
start to skid then increases in certain situa-
tions.
Always adapt your driving style to the prevail-
ing road and weather conditions.
For further information about ESP
®
, see
(Y page 66).
X
Start the engine.
X
Press = or ; on the steering wheel
to select the
Assist.
menu.
X
Press 9 or : to select
ESP.
X
Press the a button.
X
To deactivate: press a again.
The å warning lamp in the instrument
cluster comes on.
X
To activate: press a again.
The å warning lamp in the instrument
cluster goes out.
Activating/deactivating the distance
warning signal
X
Press the = or ; button on the steer-
ing wheel to select the
Assist.
menu.
X
Press 9 or : to select
Dist.
warn‐
ing.
X
Press the a button.
The currentselection is displayed.
X
To activate/deactivate: press a
again.
When the distance warning signal is activa-
ted, the multifunction display shows the
Ä symbol if the HOLD function is not acti-
vated (Y page 162).
Vehicles with Active Parking Assist: if
PARKTRONIC is activated and you are driving
at a speed under 35 km/h, the j Active
Parking Assist symbol is shown instead of the
Ä symbol (Y page 166).
For further information on the distance warn-
ing signal, see (Y page 63).
Activating/deactivating ATTENTION
ASSIST
X
Press the = or ; button on the steer-
ing wheel to select the
Assist. menu.
X
Press the 9 or : button to select
Attention Asst.
X
Press a.
The currentselection is displayed.
X
To activate/deactivate: press a
again.
When ATTENTION ASSIST(Ypage 175) is
activated, the À symbol appears in the
multifunction display when the ignition is on.
Activating/deactivating Blind Spot
Assist
X
Press the = or ; button on the steer-
ing wheel to select the
Assist. menu.
X
Press the 9 or : button to select
Blind Spot Asst..
X
Press a.
The currentselection is displayed.
X
To activate/deactivate: press a
again.
For further information about Blind Spot
Assist, see (Y page 177).
Activating/deactivating Lane Keeping
Assist
X
Press the = or ; button on the steer-
ing wheel to select the
Assist.
menu.
X
Press the 9 or : button to select
Lane Keep. Asst.
Menus and submenus
199
On-board computer and displays
Z
X
Press a.
The currentselection is displayed.
X
Press the a button to confirm.
X
Press : or 9 to set
Off, Standard
or Adaptive.
X
Press the a button to save the setting.
If Lane Keeping Assist is activated
(Y page 180)and the ignition is switched on,
the à symbol appears in the multifunction
display.
Service menu
In the Service menu, you have the following
options:
R
call up display messages (Y page 205)
R
restarting the tyre pressure loss warning
system (Y page 297)
R
calls up when a service is due
(Y page 266)
Settings menu
Introduction
In the Settings menu, you have the following
options:
R
change the instrument cluster settings
R
change the light settings
R
change the vehicle settings
R
change the convenience settings
R
restore the factory settings
Instrument cluster
Selecting the unitofmeasurement for dis-
tance
You can determine whether the multifunction
display shows some messages in miles or kil-
ometres.
X
Press the = or ; button on the steer-
ing wheel to selectthe
Settings
menu.
X
Press the : or 9 button to select the
Inst. cluster submenu.
X
Press the a button to confirm.
X
Press the : or 9 button to select the
Display unit Speed-/odometer: func-
tion.
You will see the selected setting:
km or
miles
.
X
Press the a button to save the setting.
The selected unit of measurement for dis-
tance applies to:
R
the digital speedometer in the
Trip
menu
R
the total distance recorder and the trip
meter
R
the trip computer
R
the current consumption and the range
R
the navigation instructions in the
Navi
menu
R
cruise control
R
SPEEDTRONIC
R
DISTRONIC PLUS
R
ASSYST PLUS service interval display
Switching the additional speedometer
on/off
Only vehicles with manual transmission have
this function.
X
Press the = or ; button on the steer-
ing wheel to select the
Settings menu.
X
Press the : or 9 button to select the
Inst. cluster submenu.
200
Menus and submenus
On-board computer and displays
X
Press the a button to confirm.
X
Press the : or 9 button to select the
Dig. speedo [mph] function.
You will see the selected setting:
on or
off.
X
Press the a button to save the setting.
i
Speed is displayed in mph.
i
Vehicles for the United Kingdom: this
function is not available.
The
Dig. speedo [mph] function allows you
to choose whether the status area in the mul-
tifunction display always shows the speed in
mph instead of the outside temperature.
Selecting the permanent display function
You can determine whether the multifunction
display permanently shows your speed or the
outside temperature.
X
Press the = or ; button on the steer-
ing wheel to select the
Settings menu.
X
Press the : or 9 button to select the
Inst. cluster submenu.
X
Press the a button to confirm.
X
Press the : or 9 button to select the
Permanent display: function.
You will see the selected setting:
outside
temperature or Dig. speedom [mph].
X
Press the a button to save the setting.
i
Speed is displayed in mph.
i
Vehicles for the United Kingdom: this
function is not available.
Lights
Switching the daytime driving lights on/
off
X
Switch off the engine.
X
Press the = or ; button on the steer-
ing wheel to select the
Settings menu.
X
Press the : or 9 button to select the
Light submenu.
X
Press the a button to confirm.
X
Press the : or 9 button to select the
Daytime driving lights: function.
You will see the selected setting:
on or
off
.
X
Press the a button to save the setting.
Further information on daytime driving lights
(Y page 97).
Switching the Intelligent Light System
on/off
X
Press the = or ; button on the steer-
ing wheel to select the
Settings
menu.
X
Press the : or 9 button to select the
Light submenu.
X
Press the a button to confirm.
X
Press the : or 9 button to select the
Intell. Light System: function.
You will see the selected setting:
on or
off.
X
Press the a button to save the setting.
When you activate the
Intell. Light Sys‐
tem: function, you activatethe following:
R
motorway mode
R
active light function
R
cornering light function
R
extended range foglamps
If you set the dipped-beamheadlamps for
driving on the right/left (Y page 201), the
multifunction display shows the
Intell.
Light System: System inoperative
Inactive for left-side traffic or
Intell.
Light System: System inoper‐
ative Inactive for right-side traf‐
fic display message instead of the Intell.
Light System: function in the Light sub-
menu.
Setting the dipped-beam headlamps for
driving on the left/right
X
Press the = or ; button on the steer-
ing wheel to select the
Settings menu.
X
Press the : or 9 button to select the
Light submenu.
X
Press the a button to confirm.
Menus and submenus
201
On-board computer and displays
Z
X
Press : or 9 to select the
Dipped
headl. Setting for: function.
You will see the selected setting:
Right-
side traffic or Left-side traffic.
X
Press the a button to save the setting.
When you change the setting, conversion
does not take place until the next time the
vehicle is stationary.
This function is only available on vehicles with
the Intelligent Light System.
You can use this function to switch between
symmetrical and asymmetrical dipped beam
(Y page 96).
If you set the dipped-beam headlamps for
driving on the right/left, then motorway
mode and the extended range foglamps are
not available.
You can also have the dipped-beam head-
lamps set for driving on the right/left at a
qualified specialist workshop, e.g. a
Mercedes-Benz Service Centre.
Switching Adaptive Highbeam Assist on/
off
X
Press the = or ; button on the steer-
ing wheel to select the
Settings menu.
X
Press the : or 9 button to select the
Light submenu.
X
Press the a button to confirm.
X
Press the : or 9 button to select the
Adaptive Main-beam Assist:
function.
You will see the selected setting:
Activa‐
ted or Deactivated.
X
Press the a button to save the setting.
Activating/deactivating the surround
lighting and exterior lighting delayed
switch-off
If you have activated the
Surround light‐
ing: function and the light switch is set to
Ã, the following functions are activated
when it is dark:
R
Surround lighting: the exterior lighting
remains lit for 40 seconds after unlocking
with the key. If you start the engine, the
surround lighting is switched off and auto-
matic headlamp mode is activated
(Y page 97).
R
Exterior lighting delayed switch-off: the
exterior lighting remains lit for 60seconds
after the engine is switched off. If you close
all the doors and the tailgate, the exterior
lighting goes off after 15 seconds.
X
Press the = or ; button on the steer-
ing wheel to select the
Settings menu.
X
Press the : or 9 button to select the
Light submenu.
X
Press the a button to confirm.
X
Press the : or 9 button to select the
Surround lighting:
function.
You will see the selected setting:
on
or
off.
X
Press the a button to save the setting.
Deactivating delayed switch-off of the exte-
rior lighting temporarily:
X
Before leaving the vehicle, turn the key to
position 0 in the ignition lock.
X
Turn the key to position 2 in the ignition
lock.
The exterior lighting delayed switch-off is
deactivated.
Delayed switch-off of the exterior lighting is
reactivated the next time you start the
engine.
i
Depending on your vehicle's equipment,
when the surround lighting and delayed
switch-off exterior lighting are on, the fol-
lowing light up:
R
side lamps
R
foglamps
R
dipped-beam headlamps
R
daytime driving lights
R
surround lighting in the exterior mirrors
Activating/deactivating the interior light-
ing delayed switch-off
If you activate the
Interior lighting
delay sw. off: function, the interior light-
202
Menus and submenus
On-board computer and displays
ing remains on for 20 seconds after you
remove the key from the ignition lock.
X
Press the = or ; button on the steer-
ing wheel to selectthe
Settings menu.
X
Press the : or 9 button to select the
Light submenu.
X
Press the a button to confirm.
X
Press the : or 9 button to select the
Interior lighting delay sw. off:
function.
You will see the selected setting:
on
or
off.
X
Press the a button to save the setting.
Vehicle
Setting permanent SPEEDTRONIC
X
Press the = or ; button on the steer-
ing wheel to select the
Settings menu.
X
Press the : or 9 button to select the
Vehicle submenu.
X
Press the a button to confirm.
X
Press the : or 9 button to select the
Limit
speed (winter tyres): function.
You will see the current setting.
X
Press the a button to confirm.
X
Press the : or 9 button to adjust
permanent SPEEDTRONIC in increments of
ten (
230 km/h to 160 km/h). The Off set-
ting switches permanent SPEEDTRONIC
off.
X
Press the a button to store the entry.
You can set permanent SPEEDTRONIC
(Y page 154) using the
Limit speed (win‐
ter tyres): function.
Switching the automatic locking feature
on/off
X
Press the = or ; button on the steer-
ing wheel to select the
Settings menu.
X
Press the : or 9 button to select the
Vehicle submenu.
X
Press the a button to confirm.
X
Press the : or 9 button to select the
Automatic door locks: function.
You will see the selected setting:
on or
off
.
X
Press the a button to save the setting.
If you select the
Automatic door locks:
function, the vehicle is centrally locked above
a speed of around 15 km/h.
i
For further information on the automatic
locking feature, see (Y page 77).
Activating/deactivating the acoustic
locking confirmation
If you switch on the
Acoustic Lock feed‐
back function, an acoustic signal sounds
when you lock the vehicle.
X
Press the = or ; button on the steer-
ing wheel to select the
Settings menu.
X
Press the : or 9 button to select the
Vehicle submenu.
X
Press the a button to confirm.
X
Press the : or 9 button to select the
Acoustic Lock feedback function.
You will see the selected setting:
Activa‐
ted or Deactivated.
X
Press the a button to save the setting.
Activating/deactivating the radar sensor
system
X
Press the = or ; button on the steer-
ing wheel to select the
Settings menu.
X
Press the : or 9 button to select the
Vehicle submenu.
X
Press the a button to confirm.
X
Press the 9 or : button to select
Radar sensor (See Owner's Man.)
.
You will see the selected setting:
on
or
off.
X
Press the a button to save the setting.
i
You must deactivate the radar sensor sys-
tem in certain countries and near radio
telescope facilities. For further informa-
tion, see (Y page 320).
Menus and submenus
203
On-board computer and displays
Z
If the radarsensor system is switched off,
Blind Spot Assist is deactivated
(Y page 177).
Convenience
Switching the belt adjustment on/off
X
Press the = or ; button on the steer-
ing wheel to select the
Settings
menu.
X
Press the : or 9 button to select the
Convenience submenu.
X
Press the a button to confirm.
X
Press the : or 9 button to select the
Belt adjustment: function.
You will see the selected setting:
Activa‐
ted or Deactivated.
X
Press the a button to save the setting.
For further information on belt adjustment,
see (Y page 45).
Switching on/off the fold in mirrors when
locking function
X
Press the = or ; button on the steer-
ing wheel to select the
Settings
menu.
X
Press the : or 9 button to select the
Convenience submenu.
X
Press the a button to confirm.
X
Press the : or 9 button to select the
Fold mirrors in when locking: func-
tion.
You will see the selected setting:
on or
off.
X
Press the a button to save the setting.
If you switch on the
Fold mirrors in when
locking: function, the exterior mirrors fold
in when you lock the vehicle. When you
unlock the vehicle and then open the driver's
or front-passenger door, the exterior mirrors
fold out again.
If you have switched the function on and you
fold the exterior mirrorsinusing the button
on the door (Y page 92), they will not fold out
automatically. The exterior mirrors can then
only be folded out using the button on the
door.
Resetting to factory settings
X
Press the = or ; button on the steer-
ing wheel to select the
Settings
menu.
X
Press the : or 9 button to select the
Factory setting submenu.
X
Press the a button to confirm.
The
Reset all settings? message
appears.
X
Press the : or 9 button to select
No or Yes.
X
Press the a button to confirm the selec-
tion.
If you have selected
Yes, the multifunction
display shows a confirmation message.
For safety reasons, not all functions are reset:
the
Limit speed (winter tyres): func-
tion in permanent SPEEDTRONIC can only be
set in the
Vehicle
submenu. If you want to
reset the
Daytime driving lights: in the
Light submenu, you must turn the key in the
ignition lock to position 1.
204
Menus and submenus
On-board computer and displays
Display messages
General notes
Display messages appear in themultifunction display.
Display messages with graphic symbols are simplified in theOwner's Manual and may differ
fromthe symbols in the multifunction display.
Please respond in accordance with the display messages and follow the additional notes in
this Owner's Manual.
Certain display messages are accompanied by an audible warning tone or a continuous tone.
When you stop and park the vehicle, please observe the notes on the HOLD function
(Y page 162) and parking (Y page 144).
Hiding display messages
You can hide a number of the low-priority display messages.
X
Press the a or % button on the steering wheel to hide the display message.
The display message is cleared.
High-priority display messages are red.
You cannot hide display messages of the highest priority. The multifunction display shows
these messages continuously until the causes for the messages have been remedied.
Message memory
The on-board computer saves certain display messages. You can call up the display messages
in the message memory.
X
Press = or ; on the steering wheel to select the
Serv. menu.
If there are display messages, the multifunction displayshows
2 messages, for example.
X
Press the 9 or : button to select the entry, e.g.
2 messages.
X
Confirm with a.
X
Press the 9 or : button to scroll through the display messages.
When the ignition is switched off, all display messages are deleted apart from some high-
priority display messages. Once the causes of the high-priority display messages have been
rectified, the corresponding display messages are also deleted.
Display messages
205
On-board computer and displays
Z
Safety systems
Display messages Possible causes/consequences and M Solutions
!÷
currently unavail‐
able See Owner's
Manual
ABS (Anti-lock Braking System), ESP
®
(Electronic Stability Pro-
gram), BAS (Brake Assist), PRE-SAFE
®
, the HOLD function, hill
start assist and ESP
®
trailer stabilisation are temporarily not avail-
able.
The adaptive brake lights and BAS PLUS may also have failed.
In addition, the ÷, å and ! warning lamps light up in
the instrument cluster.
ATTENTION ASSIST is deactivated.
Possible causes:
R
self-diagnosis is not yet complete.
R
the on-board voltage may be insufficient.
G
WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
This limits the steerability of the vehicle when braking and may
increase the braking distance.
If ESP
®
is deactivated or not operational, the vehicle's stability
during standard driving manoeuvres is reduced.
There is a risk of accident.
X
Carefully drive on a suitable stretch of road, making slight steer-
ing movements, at a speed above 20 km/h.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
X
Drive on carefully.
X
Visit a qualified specialist workshop.
!÷
inoperative See
Owner's Manual
ABS, ESP
®
, BAS, PRE-SAFE
®
, the HOLD function, hill start assist
and ESP
®
trailer stabilisation are not available due to a malfunc-
tion.
The adaptive brake lights and BAS PLUS may also have failed.
In addition, the J, ÷, å and ! warning lamps light
up in the instrument cluster.
ATTENTION ASSIST is deactivated.
G
WARNING
206
Display messages
On-board computer and displays
Display messages Possible causes/consequences and M Solutions
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lockifyou
brake hard, for example.
This limits the steerability of the vehicle when braking and may
increase the braking distance.
If ESP
®
is deactivated or not operational, the vehicle's stability
during standard driving manoeuvres is reduced.
There is a risk of accident.
X
Drive on carefully.
X
Visit a qualified specialist workshop immediately.
÷
currently unavail‐
able See Owner's
Manual
ESP
®
, BAS, PRE-SAFE
®
, the HOLD function, hill start assist and
ESP
®
trailer stabilisation are temporarily not available.
The adaptive brake lights and BAS PLUS may also have failed.
In addition, the ÷ and å warning lamps light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
The self-diagnosis function might not be complete, for example.
G
WARNING
The brake system continues to function normally, but without the
functions listed above.
If ESP
®
is deactivated or not operational, the vehicle's stability
during standard driving manoeuvres is reduced.
There is a risk of accident.
X
Carefully drive on a suitable stretch of road, making slight steer-
ing movements, at a speed above 20 km/h.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
X
Drive on carefully.
X
Visit a qualified specialist workshop.
Display messages
207
On-board computer and displays
Z
Display messages Possible causes/consequences and M Solutions
÷
inoperative See
Owner's Manual
ESP
®
, BAS, PRE-SAFE
®
, the HOLD function, hill start assist and
ESP
®
trailer stabilisation are notavailable due to a malfunction.
The adaptive brake lights and BAS PLUS may also have failed.
In addition, the ÷ and å warning lamps light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
G
WARNING
The brake system continues to function normally, but without the
functions listed above.
If ESP
®
is deactivated or not operational, the vehicle's stability
during standard driving manoeuvres is reduced.
There is a risk of accident.
X
Drive on carefully.
X
Visitaqualified specialist workshop.
T!
÷
inoperative See
Owner's Manual
EBD (electronic brake force distribution), ABS, ESP
®
, BAS, PRE-
SAFE
®
, the HOLD function,hill start assist and ESP
®
trailer stabi-
lisationare not available due to a malfunction.
The adaptive brake lights and BAS PLUS may also have failed.
In addition, the ÷, å and ! warning lamps in the instru-
ment cluster light up and a warning tone sounds.
ATTENTION ASSIST is deactivated.
G
WARNING
The brake system continues to function normally, but withoutthe
functions listed above. The wheels could therefore lock if you
brake hard, for example.
This limits the steerability of the vehicle when braking and may
increase the braking distance.
If ESP
®
is deactivated or not operational, the vehicle's stability
during standard driving manoeuvres is reduced.
There is a risk of accident.
X
Drive on carefully.
X
Visit a qualified specialist workshop immediately.
!
Release parking
brake
The red ! indicator lamp flashes and a warning tone sounds.
A condition for automatic release of the electric parking brake is
not fulfilled (Y page 145).
You are driving with the electric parking brake applied.
X
Release the electric parking brake manually.
208
Display messages
On-board computer and displays
Display messages Possible causes/consequences and M Solutions
The red ! indicatorlamp flashes and a warning tone sounds.
You are making an emergency stop using the electric parking
brake (Y page 145).
!
Parking brake See
Owner's Manual
The yellow ! warning lamp lights up.
The electric parking brake is malfunctioning.
To apply:
X
Switch the ignition off.
X
Press the electric parking brake handle for at least tenseconds.
X
Vehicles with manual transmission: engage first gear.
X
Vehicles with automatic transmission: shift the transmission
to P.
X
Consult a qualified specialist workshop.
The yellow ! warning lamp and the red ! indicator lamp
are lit.
The electric parking brake is malfunctioning.
To release:
X
Switch off the ignition and turn it back on.
X
Release the electric parking brake manually.
or
X
Vehicles with manual transmission: release the electric park-
ing brake using the automatic emergency release
(Y page 145).
X
Vehicles with automatic transmission: release the electric
parking brake automatically (Y page 145).
If the yellow ! warning lamp remains lit or continues to flash:
X
Do not drive on.
X
Consult a qualified specialist workshop.
Display messages
209
On-board computer and displays
Z
Display messages Possible causes/consequences and M Solutions
The red ! indicatorlamp flashes and the yellow ! warning
lamp is lit.
The electric parking brake is malfunctioning.
To release:
X
Switch off the ignition and turn it back on.
X
Release the electric parking brake manually.
To apply:
X
Switch off the ignition and turn it back on.
X
Engage the electric parking brake manually.
If the red ! indicator lamp continues to flash:
X
Do not drive on.
X
Secure the vehicle against rolling away (Y page 299).
X
Vehicles with manual transmission: engage first gear.
X
Vehicles with automatic transmission: shiftthe transmission
to P.
X
Turn the front wheels towards the kerb.
X
Consult a qualified specialist workshop.
The yellow ! warning lamp lights up. The red ! indicator
lamp flashes for about ten seconds after the electric parking brake
has been applied or released. It then goes out or remains lit.
The electric parking brake is malfunctioning.
X
Switch off the ignition and turn it back on.
X
Engage the electric parking brake.
If it is not possible to apply the electric parking brake:
X
Vehicles with manual transmission: engage first gear.
X
Vehicles with automatic transmission: shift the transmission
to P.
X
Visit a qualified specialist workshop.
If it is not possible to release the electric parking brake:
X
Vehicles with manual transmission: release the electric park-
ing brake using the automatic emergency release
(Y page 145).
X
Vehicles with automatic transmission: release the electric
parking brake automatically (Y page 145).
If the electric parking brake can still not be released:
X
Consult a qualified specialist workshop.
210
Display messages
On-board computer and displays
Display messages Possible causes/consequences and M Solutions
The yellow ! warning lamp lights up. If you manually apply or
release the electric parkingbrake, the red ! indicator lamp
flashes.
The electric parking brake is malfunctioning. It is not possible to
apply the electric parking brake manually.
X
Vehicles with manual transmission: switch off the ignition.
The electric parking brake is applied automatically.
You can release the electric parking brake using the automatic
emergency release (Y page 145).
X
Vehicles with automatic transmission: shift the transmission
to P as the electric parking brake is not applied automatically.
X
Visitaqualified specialist workshop.
i
If you do not wish the electric parking brake to be applied,
leave the ignition switched on, e.g. when washing the vehicle in
an automatic car wash or when having the vehicle towed. Excep-
tion:when having the vehicle towed with the front axle raised
(Y page 284).
!
Pkg brake inopera‐
tive
The yellow ! warning lamp lights up. The red ! indicator
lamp flashes for about ten seconds after the electric parking brake
has been applied or released. It then goes out or remains lit.
The electric parking brake is malfunctioning, e.g. because of over-
voltage or undervoltage.
X
Remove the cause for the overvoltage or undervoltage, e.g. by
charging the battery or restarting the engine.
X
Apply or release the electric parking brake.
If it remains impossible to apply or release the electric parking
brake:
X
Switch off the ignition and turn it back on.
X
Apply or release the electric parking brake.
If the electric parking brake can still not be released:
X
Consult a qualified specialist workshop.
The display message is only shown while the vehicle is in motion.
The red ! indicator lamp flashes and the yellow ! warning
lamp is lit.
It is not possible to apply the electric parking brake manually.
X
Vehicles with manual transmission: engage first gear.
X
Vehicles with automatic transmission: shift the transmission
to P.
X
Visit a qualified specialist workshop.
Display messages
211
On-board computer and displays
Z
Display messages Possible causes/consequences and M Solutions
!
Turn on the igni‐
tion to release
the parking brake
The red ! indicatorlamp is lit.
You attempted to release the electric parking brakewhile the igni-
tion was switched off.
X
Turn the key to position 1 in the ignition lock.
J
Check brake fluid
level
There is insufficient brake fluid in the brake fluid reservoir.
In addition, the red J warning lamp in the instrument cluster
lights up and a warning tone sounds.
G
WARNING
The braking effect may be impaired.
There is a risk of accident.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X
Engage the electric parking brake.
X
Do not top up the brake fluid. Topping up will not remedy the
fault.
X
Consult a qualified specialist workshop.
#
Check brake wear
The brake pads/linings have reached their wear limit.
X
Visit a qualified specialist workshop.
PRE-SAFE
inoperative See
Owner's Manual
Important functions of PRE-SAFE
®
have failed. All other occupant
safety systems, e.g. airbags, remain available.
X
Visit a qualified specialist workshop immediately.
212
Display messages
On-board computer and displays
Display messages Possible causes/consequences and M Solutions
PRE-SAFE
Functions cur‐
rently limited See
Owner's Manual
BASPLUS is temporarily inoperative. Possible causes:
R
the radarsensor system cover in the radiator grille is dirty.
R
function is impaired due to heavy rain or snow.
R
the sensors in the bumpers are dirty.
R
the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
R
the system is outside the operating temperature range.
R
the on-board voltage is too low.
If the display message does not disappear:
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Engage the electric parking brake.
X
Clean the radar sensor system cover in the radiator grille
(Y page 270).
X
Clean the bumpers (Y page 270).
X
Restart the engine.
If the system detects that the sensors are fully operational, the
display message disappears.
BASPLUS is operational again.
PRE-SAFE
Functions limited
See Owner's Manual
BAS PLUS is faulty. The distance warning signal may also have
failed.
X
Visit a qualified specialist workshop.
ü
If the symbol appears in the multifunction display, aseat belt
tongue has been inserted into a rear seat belt buckle.
For further information on the status indicator for the rear seat
belts, (Y page 46).
ý
If the symbol appears in the multifunction display, aseat belt
tongue has not been inserted in a rear seat belt buckle.
G
WARNING
If you do not wear the seat belt correctly, or it is not properly
engaged in the buckle, it no longer offers the intended level of
protection in the event of an accident.
There is an increased risk of injury.
X
If necessary, ask the occupants in the rear to fasten their seat
belts.
For further information on the status indicator for the rear seat
belts, (Y page 46).
Display messages
213
On-board computer and displays
Z
Display messages Possible causes/consequences and M Solutions
6
Restraint sys. mal‐
function Consult
workshop
There is a malfunction in the SRS (Supplemental RestraintSys-
tem). The 6 warning lamp also lights up in the instrumentclus-
ter.
G
WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the eventofanaccident, may not be triggered at all.
There is an increased riskofinjury.
X
Visitaqualified specialist workshop.
For further information on occupant safety, see (Y page 38).
6
Front left malfunc‐
tion Consult work‐
shop or Front
right malfunction
Consult workshop
SRS has malfunctioned at the front on the left or right. The 6
warning lamp also lights up in the instrument cluster.
G
WARNING
The airbags or belt tensionersmay either be triggered uninten-
tionally or, in the event of an accident, may notbe triggered at all.
There is an increased risk of injury.
X
Visit a qualified specialist workshop.
6
Rear left malfunc‐
tion Consult work‐
shop or Rear
right malfunction
Consult workshop
SRS has malfunctioned at the rear on the left or right. The 6
warning lamp also lights up in the instrument cluster.
G
WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the event of an accident, may not be triggered at all.
There is an increased risk of injury.
X
Visit a qualified specialist workshop.
214
Display messages
On-board computer and displays
Display messages Possible causes/consequences and M Solutions
6
Rear centre mal‐
function Consult
workshop
SRS has malfunctioned at the rear centre. The 6 warning lamp
also lights up in the instrumentcluster.
G
WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the eventofanaccident, may not be triggered at all.
There is an increased riskofinjury.
X
Visitaqualified specialist workshop.
6
Left windowbag mal‐
function Consult
workshop or Right
windowbag malfunc‐
tion Consult work‐
shop
There is a malfunction in the left-hand and/or right-hand window-
bag. The 6 warning lamp also lights up in the instrument clus-
ter.
G
WARNING
The left-hand and/or right-hand windowbag may either be trig-
gered unintentionally or, in the event of an accident, may not be
triggered at all.
There is an increased risk of injury.
X
Visit a qualified specialist workshop.
Lights
i
Display messages about LEDs:
This display message will only appear if all LEDs have failed.
Display messages Possible causes/consequences and M Solutions
b
Left cornering
light or Right cor‐
nering light
The left or right-hand cornering light is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
b
Left dipped beam
or Right dipped
beam
The left or right-hand dipped-beam headlamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
Display messages
215
On-board computer and displays
Z
Display messages Possible causes/consequences and M Solutions
b
Trailer left tail
lamp or Trailer
right tail lamp
The leftorright-hand trailer tail lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself.
or
X
Visit a qualified specialist workshop.
b
Trailer left indi‐
cator or Trailer
right indicator
The left or right-hand trailer turnsignal lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself.
or
X
Visit a qualified specialist workshop.
b
Trailer brake lamp
The trailer brake lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself.
or
X
Visit a qualified specialist workshop.
b
Rear left indica‐
tor or Rear right
indicator
The rear left-hand or rear right-hand turnsignal is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
b
Front left indica‐
tor or Front right
indicator
The front left-hand or front right-hand turn signal is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
b
Left mirror indica‐
tor or Right mir‐
ror indicator
The turn signal in the left-hand or right-hand exterior mirror is
faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
b
Third brake lamp
The third brake lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
216
Display messages
On-board computer and displays
Display messages Possible causes/consequences and M Solutions
b
Left brake lamp or
Right brake lamp
The leftorright-hand brake lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
b
Left-hand tail
lamp/brake lamp or
Right-hand tail
lamp/brake lamp
The left or right-hand tail lamp/brake lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
b
Left main beam or
Right main beam
The left or right-hand high beam is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
b
Number plate lamp
The left or right-hand licence plate lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
b
Left fog
lamporRight fog
lamp
The left-hand or right-hand front foglamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
b
Rear fog lamp
The rear foglamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
b
Front left parking
lamp or Front
right parking lamp
The front left or front right parking lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
Display messages
217
On-board computer and displays
Z
Display messages Possible causes/consequences and M Solutions
b
Reversing light
The reversing lamp is faulty.
X
Checkwhether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
b
Left tail lamp or
Right tail lamp
The left or right-hand tail lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
b
Left daytime driv‐
ing lamp
or
Right daytime
driving lamp
The left or right-hand daytime driving lamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 103).
or
X
Visit a qualified specialist workshop.
b
Intell. Light Sys‐
tem inoperative
The Intelligent Light System is faulty. The lights remain available
without the Intelligent Light System.
X
Visit a qualified specialist workshop.
b
Malfunction See
Owner's Manual
The exterior lighting is faulty.
X
Visit a qualified specialist workshop.
b
Malfunction See
Owner's Manual
The exterior lighting is faulty.
X
Visit a qualified specialist workshop.
Vehicles with trailer tow hitch: a fuse may have blown.
X
Check the fuses (Y page 287).
X
If necessary, replace the blown fuse. Observe the warning notes
as you do so.
If the display message continues to be displayed:
X
Visit a qualified specialist workshop.
b
AUTO lights inoper‐
ative
The light sensor is faulty.
X
Visit a qualified specialist workshop.
218
Display messages
On-board computer and displays
Display messages Possible causes/consequences and M Solutions
b
Switch off lights
The lights are still switched on when you leave the vehicle. A
warning tone also sounds.
X
Turnthe light switch to Ã.
Adaptive Main-beam
Assist inoperative
Adaptive Highbeam Assist is faulty.
X
Visit a qualified specialist workshop.
Adaptive Main-beam
Assist currently
unavailable See
Owner's Manual
Adaptive Highbeam Assist is deactivated and temporarily inoper-
ative. Possible causes:
R
the windscreen is dirty in the camera's field of vision.
R
visibility is impaired due to heavy rain, snow or fog.
X
Cleanthe windscreen.
If the system detects that the camera is fully operational again,
the
Adaptive Main-beam Assist available again message
is displayed.
Adaptive Highbeam Assist is operational again.
Engine
Display messages Possible causes/consequences and M Solutions
+
Top up coolant See
Owner's Manual
The coolant level is too low.
!
Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
X
Top up the coolant, observing the warning notes before doing
so (Y page 265).
X
If the coolant needs topping up more often than usual, have the
engine coolant system checked at a qualified specialist work-
shop.
?
The fan motor is faulty.
X
If the coolant temperature is less than 120 †, you can continue
driving to the nearest qualified specialist workshop.
X
Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop-start traffic.
Display messages
219
On-board computer and displays
Z
Display messages Possible causes/consequences and M Solutions
?
Coolant Stop vehi‐
cle Switch engine
off
The coolantis too hot.
Awarning tone also sounds.
G
WARNING
Do notdrive when yourengine is overheated. Thiscan cause some
fluids which may have leaked into the engine compartmentto
catch fire.
Steamfrom the overheated engine can also cause serious burns
which can occur just by opening the bonnet.
There is a risk of injury.
X
Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X
Engage the electric parking brake.
X
Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X
Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X
Do not start the engine again until the display message goes out
and the coolant temperature is under 120 †. The engine may
otherwise be damaged.
X
Pay attention to the coolant temperature display.
X
If the temperature increases again, visit a qualified specialist
workshop immediately.
The reading may rise up to 120 †undernormal driving conditions
if the coolant has been filled correctly.
#
The battery is not being charged.
Possible causes:
R
faulty alternator
R
torn poly-V-belt
R
a malfunction in the electronics
X
Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X
Open the bonnet.
X
Check whether the poly-V-belt is torn.
If the poly-V-belt is torn:
!
Do not continue driving. The engine could otherwise overheat.
X
Consult a qualified specialist workshop.
If the poly-V-belt is OK:
X
Visit a qualified specialist workshop immediately.
220
Display messages
On-board computer and displays
Display messages Possible causes/consequences and M Solutions
4
Check eng. oil
lev. when next
refuelling
The engine oil level has dropped to the minimum level.
Awarning tone also sounds.
X
Checkthe oil level when next refuelling, at the latest
(Y page 263).
X
If necessary, top up the engine oil (Y page 264).
X
Have the engine checked at a qualified specialist workshop if
the engine oil needs topping up more often than usual.
æ
Reserve fuel level
The fuel level has dropped into the reserve range.
X
Refuel at the nearest filling station.
ç
There is only a very small amount of fuel in the fuel tank.
X
Refuel at the nearest filling station without fail.
¸
Replace air cleaner
Vehicles with a diesel engine: the engine air filter is dirty and must
be replaced.
X
Visit a qualified specialist workshop.
!
Clean the fuel fil‐
ter
Vehicles with a diesel engine: there is water in the fuel filter. The
water must be drained off.
X
Visit a qualified specialist workshop.
Driving systems
Display messages Possible causes/consequences and M Solutions
À
Attention Assist:
Drowsiness detec‐
ted
Based on certain criteria, ATTENTION ASSIST has detected fatigue
or alack of concentration on thepart of thedriver. A warning tone
also sounds.
X
If necessary, take a break.
During long journeys, take regular breaks in good time so you get
enough rest.
À
Attention Assist
inoperative
ATTENTION ASSIST is inoperative.
X
Visitaqualified specialist workshop.
Display messages
221
On-board computer and displays
Z
Display messages Possible causes/consequences and M Solutions
Speed Limit Assist
currently unavail‐
able See Owner's
Manual
Speed Limit Assistis deactivated and temporarily inoperative.
Possible causes:
R
the windscreen is dirty in the camera's field of vision.
R
visibility is impaired due to heavy rain, snow or fog.
X
Cleanthe windscreen.
If the system detects that the camera is fully operational, the dis-
play message disappears.
Speed Limit Assist is operational again.
Speed Limit Assist:
Unavailable in
this country
Speed Limit Assist is only available in certain countries.
X
Drive on.
Speed Limit Assist is available again as soon as you drive into a
country in which its use is approved.
Speed Limit Assist
inoperative
Speed Limit Assist is faulty.
X
Visit a qualified specialist workshop.
ë
Off
The HOLD function is deactivated. The vehicle is skidding.
Awarning tone also sounds.
X
Reactivate the HOLD function later (Y page 162).
Radar sensor
deactivated See
Owner's Manual
The radar sensor system is deactivated.
X
Checkwhether or not the radar sensor system may be activated
(Y page 320).
X
Switch on the radar sensor system (Y page 203).
Radar sensor
deactivated autom.
See Owner's Manual
Vehicles with a navigation system: the vehicle is close to a radio
telescope facility and is therefore prohibited from transmitting any
radar signals. The radar sensor system has switched off automat-
ically.
Blind Spot Assist (Y page 177) is deactivated automatically if it is
activated. The yellow 9 indicator lamps also light up in the
exterior mirrors.
X
Drive on.
Blind Spot Assist is available again as soon as the vehicle is far
enough away from the radio-astronomical installation
(Y page 320).
222
Display messages
On-board computer and displays
Display messages Possible causes/consequences and M Solutions
Vehicles with Becker
®
MAP PILOT: if the Becker
®
MAP PILOT is
notconnected, the radar sensor system is deactivated automati-
cally.
Blind Spot Assist is not available.
X
Connect the Becker
®
MAP PILOT; see the separate operating
instructions.
Lane Keeping
Assist currently
unavailable See
Owner's Manual
Lane Keeping Assist is deactivated and temporarily inoperative.
Possible causes:
R
the windscreen is dirty in the camera's field of vision.
R
visibility is impaired due to heavy rain, snow or fog.
R
there are no lane markings for a longer period.
R
the lane markings are worn, dark or covered, e.g. by dirt or snow.
If the display message does not disappear:
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Engage the electric parking brake.
X
Clean the windscreen.
If the system detects that the camera is fully operational, the dis-
play message disappears.
Lane Keeping Assist or Active Lane Keeping Assist is operational
again.
Lane Keeping
Assist inoperative
Lane Keeping Assist is faulty.
X
Visit a qualified specialist workshop.
Display messages
223
On-board computer and displays
Z
Display messages Possible causes/consequences and M Solutions
Blind Spot Assist
currently unavail‐
able See Owner's
Manual
Blind Spot Assistis temporarily inoperative. Possible causes:
R
you have established the electrical connection between the
trailer and your vehicle.
R
the sensors are dirty.
R
function is impaired due to heavy rain or snow.
R
the radar sensor system is outside the operating temperature
range.
R
the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
The yellow 9 indicator lamps also light up in the exterior mir-
rors.
X
When towing a trailer, confirm the display message with a.
If you are driving without a trailer and the displaymessage does
not disappear:
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Engage the electric parking brake.
X
Clean the sensors (Y page 270).
X
Restart the engine.
If the system detects that the sensors are fully operational, the
display message disappears.
Blind Spot Assist is operational again.
Blind Spot Assist
inoperative
Blind Spot Assist is faulty.
The yellow 9 indicator lamps also light up in the exterior mir-
rors.
X
Visit a qualified specialist workshop.
Park Assist
cancelled
The driver's door is open and the driver's seat belt has not been
fastened.
X
Repeat the parking process with the seat belt fastened and the
driver's door closed.
You have inadvertently touched the multifunction steering wheel
while steering intervention was active.
X
While steering intervention is active, make sure that the multi-
function steering wheel is not touched.
The vehicle has started to skid and ESP
®
has intervened.
X
Use Active Parking Assist again later (Y page 166).
224
Display messages
On-board computer and displays
Display messages Possible causes/consequences and M Solutions
Park Assist
inoperative
You have just carried out a large number of turning or parking
manoeuvres.
Active Parking Assistwill become available again after approx-
imately ten minutes (Y page 166).
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Switch off and restart the engine.
If the display message continues to be displayed:
X
Visit a qualified specialist workshop.
PARKTRONIC is faulty.
X
Visit a qualified specialist workshop.
DISTRONIC PLUS
off
DISTRONIC PLUS has been deactivated (Y page 154). If it was
deactivated automatically, a warning tone also sounds.
DISTRONIC PLUS
available again
DISTRONIC PLUS is operational again after having been tempo-
rarily unavailable. You can now reactivate DISTRONIC PLUS
(Y page 154).
Display messages
225
On-board computer and displays
Z
Display messages Possible causes/consequences and M Solutions
DISTRONIC PLUS
currently unavail‐
able See Owner's
Manual
DISTRONIC is deactivated and temporarily inoperative. Possible
causes:
R
the DISTRONIC PLUS cover in the radiator grille is dirty.
R
function is impaired due to heavy rain or snow.
R
the sensors in the bumpers are dirty.
R
the radarsensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
R
the system is outside the operating temperature range.
R
the on-board voltage is too low.
Awarning tone also sounds.
If the display message does notdisappear:
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Engage the electric parking brake.
X
Clean the DISTRONIC PLUS cover in the radiator grille
(Y page 270).
X
Clean the bumpers (Y page 270).
X
Restartthe engine.
If the system detects that the sensors are fully operational, the
display message disappears.
DISTRONIC is operational again.
DISTRONIC PLUS
inoperative
DISTRONIC PLUS is faulty. BAS PLUS (Brake Assist PLUS) may
also have failed.
Awarning tone also sounds.
X
Visitaqualified specialist workshop.
DISTRONIC PLUS
inactive
You have depressed the accelerator pedal. DISTRONIC PLUS is no
longer controlling the speed of the vehicle.
X
Remove your foot from the accelerator pedal.
DISTRONIC PLUS
--- km/h
An activation condition for DISTRONIC PLUS is not fulfilled.
X
Check the activation conditions for DISTRONIC PLUS
(Y page 156).
DISTRONIC PLUS and
SPEEDTRONIC
inoperative
DISTRONIC PLUS and SPEEDTRONIC are faulty. A warning tone
also sounds.
X
Visit a qualified specialist workshop.
226
Display messages
On-board computer and displays
Display messages Possible causes/consequences and M Solutions
Cruise control and
SPEEDTRONIC
inoperative
Cruise control and SPEEDTRONIC are malfunctioning.
Awarning tone also sounds.
X
Visitaqualified specialist workshop.
Limit
--- km/h
While depressing the accelerator pedal beyond the pressure point
(kickdown), SPEEDTRONIC cannot be activated.
Cruise control
--- km/h
A condition for activating cruise control has not been met.
You have tried to store aspeed below 30 km/h, for example.
X
If conditions permit, drive faster than 30 km/h and store the
speed.
X
Check the activation conditions for cruise control
(Y page 150).
120 km/h
Maximum speed
exceeded
Only for certain countries: the maximum speed has been excee-
ded.
In addition, the multifunction display shows
120 km/h.
X
Drive slower.
Display messages
227
On-board computer and displays
Z
Tyres
Display messages Possible causes/consequences and M Solutions
Tyre pressure
Check tyres
The tyre pressure loss warning system has detected a significant
loss in pressure.
Awarning tone also sounds.
G
WARNING
Underinflated or overinflated tyres pose the following risks:
R
they may burst, especially as the load and vehicle speed
increase.
R
they may wear excessively and/or unevenly, whichmay greatly
impair tyre traction.
R
the driving characteristics, as well as steering and braking, may
be greatly impaired.
There is a riskofaccident.
X
Stop the vehicle withoutmaking any suddensteering or braking
manoeuvres.Pay attentionto the traffic conditions as you do
so.
X
If there is a flat tyre, inspect the tyres (Y page 276).
X
Check the tyre pressures and, if necessary, set to the correct
tyre pressure.
X
Restart the tyre pressure loss warning system when the tyre
pressure is correct(Ypage 297).
For further information on tyre pressure, see (Y page 295).
Check tyre pres‐
sures
then restart Run
Flat Indicator
The tyre pressure loss warning system generated a display mes-
sage and has not been restarted since.
X
Set the correct tyre pressure in all four tyres.
X
Restart the tyre pressure loss warning system (Y page 297).
Run Flat Indicator
inoperative
The tyre pressure loss warning system is faulty.
X
Visit a qualified specialist workshop.
228
Display messages
On-board computer and displays
Vehicle
Display messages Possible causes/consequences and M Solutions
To start engine,
shift to either P
or N
You have attempted to start the engine with the transmission in
position R or D.
X
Shift the transmission to position P or N.
Auxiliary battery
malfunction
The auxiliary battery for the automatic transmission is no longer
being charged.
X
Visit a qualified specialist workshop at the next opportunity.
X
Until then, set the automatic transmission to position P before
you switch off the engine.
X
Before leaving the vehicle, apply the electricparking brake.
Apply brake to
deselect
Park (P) position
You have attempted to movethe transmission selector lever to
position D, R or N without depressing the brake pedal.
X
Depress the brake pedal.
Vehicle
not in position P
The driver's door is open and the transmission is in position R, N
or D.
Awarning tone also sounds.
X
Shift the transmission to position P.
X
Engage the electric parking brake.
Without changing
gear,
consult workshop
You cannotchange the transmission position due to a malfunction.
Awarning tone also sounds.
If transmission position D is selected:
X
Drive to a qualified specialist workshop without shifting the
transmission from position D.
If transmission position R, N or P is selected:
X
Consult a qualified specialist workshop.
Only select Park
(P)
when vehicle is
stationary
The vehicle is moving.
X
Pull overand stop the vehicle safely as soonas possible, paying
attention to road and traffic conditions.
X
Shift the transmission to position P.
Display messages
229
On-board computer and displays
Z
Display messages Possible causes/consequences and M Solutions
A
The tailgate is open.
G
WARNING
Whenthe engine is running, exhaust gases can enter the vehicle
interior if the tailgate is open.
There is a risk of poisoning.
X
Close the tailgate.
?
The bonnet is open.
G
WARNING
The open bonnet may block your view when the vehicle is in
motion.
There is a risk of accident.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Engage the electric parking brake.
X
Close the bonnet.
C
At least one door is open. Awarning tone also sounds.
X
Close all doors.
j
Check trailer
hitch lock
The trailer tow hitch is notcorrectly engaged.
Awarning tone also sounds.
X
Stop the vehicle immediately, paying attentiontoroad and traf-
fic conditions, and switch off the engine.
X
Engage the electric parking brake.
X
Allow the trailer tow hitch ball coupling to engage in the end
position (Y page 183).
Otherwise, the trailer may detach itself.
D
Power steering mal‐
function See Own‐
er's Manual
The power steering assistance is faulty. You will need to use more
force to steer.
Awarning tone also sounds.
X
Checkwhether you are able to apply the extra force required.
X
If you are able to steer safely: carefully drive on to a qualified
specialist workshop.
X
If you are unable to steer safely: do not drive on. Contact the
nearest qualified specialist workshop.
230
Display messages
On-board computer and displays
Display messages Possible causes/consequences and M Solutions
Telephone No
service
Your vehicle is outside the network provider's transmitter/
receiver range.
X
Wait until the mobile phone operational readiness symbol
appears in the multifunction display.
¥
Top up washer fluid
The washer fluid level in thewasher fluid reservoir has dropped
below the minimum.
X
Top up the washerfluid (Y page 265).
Key
Displaymessages Possible causes/consequences and M Solutions
+
Key does not
belong to vehicle
You have put the wrong key in the ignitionlock.
X
Use the correct key.
+
Replace key
The key needs to be replaced.
X
Visit a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster
Seat belts
Problem Possible causes/consequences and M Solutions
ü
Only for certain coun-
tries: the red seat belt
warning lamp lights up
for six seconds after
the engine starts.
The seat belt warning lamp reminds the driver and front passenger
to fasten their seat belts.
X
Fasten your seat belt (Y page 44).
ü
Only for certain coun-
tries: the red seat belt
warning lamp lights up
after the engine starts.
In addition, a warning
tone sounds for up to
six seconds.
The driver's seat belt is not fastened.
X
Fasten your seat belt (Y page 44).
The warning tone ceases.
Warning and indicator lamps in the instrument cluster
231
On-board computer and displays
Z
Problem Possible causes/consequences and M Solutions
ü
The red seat belt warn-
ing lamp lights up after
the engine starts, as
soon as the driver's or
the front-passenger
door is closed.
The driver or front passenger has not fastened their seat belt.
X
Fasten your seat belt (Y page 44).
The warning lamp goes out.
There are objects on the front-passenger seat.
X
Remove the objects from the front-passenger seat and stow
them in a secure place.
The warning lamp goes out.
ü
The red seat belt warn-
ing lamp flashes and an
intermittentaudible
warning sounds.
The driver or frontpassenger has notfastened their seat belt.At
the same time, you are driving fasterthan 25 km/h or have briefly
driven faster than 25 km/h.
X
Fasten your seat belt (Y page 44).
The warning lamp goes out and the intermittent warning tone
ceases.
There are objects on the front-passenger seat. At the same time,
you are driving faster than 25 km/h or have briefly driven faster
than 25 km/h.
X
Remove the objects from the front-passenger seat and stow
them in a secure place.
The warning lamp goes out and the intermittent warning tone
ceases.
232
Warning and indicator lamps in the instrument cluster
On-board computer and displays
Safety systems
Problem Possible causes/consequences and M Solutions
J
The red brake system
warning lamp comes on
while the engine is run-
ning. A warning tone
also sounds.
There is insufficient brake fluid in the brake fluid reservoir.
G
WARNING
The braking effect may be impaired.
There is a risk of accident.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X
Engage the electric parking brake.
X
Do not top up the brake fluid. Topping up will not remedy the
fault.
X
Consult a qualified specialist workshop.
X
Observe the additional display messages in the multifunction
display.
!
The yellow ABS warning
lamp is lit while the
engine is running.
ABS (Anti-lock Brake System) has been deactivated due to a fault.
For this reason, BAS (Brake Assist), BAS PLUS, ESP
®
(Electronic
Stability Program), PRE-SAFE
®
, the HOLD function, hill start assist,
the adaptive brake lights and ESP
®
trailer stabilisation are also
deactivated, for example.
ATTENTION ASSIST is deactivated.
G
WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
This limits the steerability of the vehicle when braking and may
increase the braking distance.
If ESP
®
is deactivated or not operational, the vehicle's stability
during standard driving manoeuvres is reduced.
There is a risk of accident.
X
Observe the additional display messages in the multifunction
display.
X
Drive on carefully.
X
Visit a qualified specialist workshop.
If the ABS control unit is faulty, there is also a possibility that other
systems, such as the navigation system or the automatic trans-
mission, will not be available.
Warning and indicator lamps in the instrument cluster
233
On-board computer and displays
Z
Problem Possible causes/consequences and M Solutions
!
The yellow ABS warning
lamp is lit while the
engine is running.
ABS is temporarily unavailable. Therefore, BAS, BAS PLUS, ESP
®
,
EBD (electronic brake force distribution), PRE-SAFE
®
, the HOLD
function, hill start assist, the adaptive brake lights and ESP
®
trailer
stabilisation, for example, are also deactivated.
Possible causes:
R
self-diagnosis is not yet complete.
R
the on-board voltage may be insufficient.
ATTENTION ASSIST is deactivated.
G
WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
This limits the steerability of the vehicle when braking and may
increase the braking distance.
If ESP
®
is deactivated or not operational, the vehicle's stability
during standard driving manoeuvres is reduced.
There is a risk of accident.
X
Carefully drive on a suitable stretch of road, making slight steer-
ing movements, at a speed above 20 km/h.
The functions mentioned above are available again when the
warning lamp goes out.
If the warning lamp is still on:
X
Observe the additional display messages in the multifunction
display.
X
Drive on carefully.
X
Visit a qualified specialist workshop.
234
Warning and indicator lamps in the instrument cluster
On-board computer and displays
Problem Possible causes/consequences and M Solutions
!
The yellow ABS warning
lamp is lit while the
engine is running. A
warning tone also
sounds.
EBD is faulty. Therefore, ABS,BAS, BAS PLUS, ESP
®
, PRE-SAFE
®
,
the HOLD function, hill start assist, the adaptive brake lights and
ESP
®
trailer stabilisation, for example, are not available either.
ATTENTION ASSIST is deactivated.
G
WARNING
The brake system continuesto function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
This limits the steerability of the vehicle when braking and may
increase the braking distance.
If ESP
®
is deactivated or not operational, the vehicle's stability
during standard driving manoeuvres is reduced.
There is a risk of accident.
X
Observe the additional display messages in the multifunction
display.
X
Drive on carefully.
X
Visit a qualified specialist workshop.
J֌!
The red brake warning
lamp, the yellow ESP
®
and ESP
®
OFF warning
lamps and the yellow
ABS warning lamp are
lit while the engine is
running.
ABS and ESP
®
are malfunctioning. Therefore, BAS, BAS PLUS,
EBD,PRE-SAFE
®
, the HOLD function,hill start assist, the adaptive
brake lights and ESP
®
trailer stabilisation, for example, are not
available either.
ATTENTION ASSIST is deactivated.
G
WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
This limits the steerability of the vehicle when braking and may
increase the braking distance.
If ESP
®
is deactivated or not operational, the vehicle's stability
during standard driving manoeuvres is reduced.
There is a risk of accident.
X
Observe the additional display messages in the multifunction
display.
X
Drive on carefully.
X
Visit a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster
235
On-board computer and displays
Z
Problem Possible causes/consequences and M Solutions
÷
The yellow ESP
®
warn-
ing lamp flashes while
the vehicle is in motion.
ESP
®
or traction control has intervened because there is a risk of
skidding or at least one wheel has started to spin.
Cruise control or DISTRONIC PLUS is deactivated.
X
Only depress the accelerator pedal as far as necessary when
pulling away.
X
Accelerate more gently while the vehicle is in motion.
X
Adapt your driving style to suit the road and weather conditions.
X
Do not deactivate ESP
®
.
For exceptions, see: (Y page 66).
å
The yellow ESP
®
OFF
warning lamp is lit while
the engine is running.
ESP
®
and ESP
®
trailer stabilisation are deactivated. ESP
®
will not
stabilise the vehicle if it starts to skid or if awheel starts to spin.
G
WARNING
If ESP
®
is deactivated, the vehicle's stability during standard driv-
ing manoeuvres is reduced.
There is a risk of accident.
X
Reactivate ESP
®
.
For exceptions, see: (Y page 66).
X
Adapt your driving style to suit the road and weather conditions.
If ESP
®
cannot be activated:
X
Have ESP
®
checked at a qualified specialist workshop.
֌
The yellow ESP
®
and
ESP
®
OFF warning
lamps are lit while the
engine is running.
ESP
®
, BAS, BAS PLUS, PRE-SAFE
®
, the HOLD function, hill start
assist, the adaptive brake lights and ESP
®
trailer stabilisation are
not available due to a malfunction.
ATTENTION ASSIST is deactivated.
G
WARNING
ESP
®
will not stabilise the vehicle if it starts to skid or if a wheel
starts to spin.
The brake system continues to function normally, but without the
functions listed above.
If ESP
®
is deactivated or not operational, the vehicle's stability
during standard driving manoeuvres is reduced.
There is a risk of accident.
X
Observe the additional display messages in the multifunction
display.
X
Drive on carefully.
X
Visit a qualified specialist workshop.
236
Warning and indicator lamps in the instrument cluster
On-board computer and displays
Problem Possible causes/consequences and M Solutions
֌
The yellow ESP
®
and
ESP
®
OFF warning
lamps are lit while the
engine is running.
ESP
®
, BAS, PRE-SAFE
®
, the HOLD function, hill start assist and
ESP
®
trailer stabilisation are temporarily not available.
The adaptive brake lights and BAS PLUS may also have failed.
ATTENTION ASSIST is deactivated.
G
WARNING
ESP
®
will not stabilise the vehicle if it starts to skid or if a wheel
starts to spin.
Self-diagnosis is not yet complete.
The brake system continues to function normally, but without the
functions listed above.
If ESP
®
is deactivated or not operational, the vehicle's stability
during standard driving manoeuvres is reduced.
There is a risk of accident.
X
Carefully drive on a suitable stretch of road, making slight steer-
ing movements, at a speed above 20 km/h.
The functions mentioned above are available again when the
warning lamp goes out.
If the warning lamp is still on:
X
Observe the additional display messages in the multifunction
display.
X
Drive on carefully.
X
Visit a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster
237
On-board computer and displays
Z
Problem Possible causes/consequences and M Solutions
!
The red indicator lamp
for the electric parking
brake flashes and/or
the yellow warning
lamp for the electric
parking brake lights up.
The electric parking brake is temporarily malfunctioning or is
defective.
X
Observe the additional display messages in the multifunction
display.
6
The red SRS warning
lamp is lit while the
engine is running.
There is a malfunction in the SRS (Supplemental Restraint Sys-
tem).
G
WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the event of an accident, may not be triggered at all.
There is an increased risk of injury.
X
Drive on carefully.
X
Have SRS checked at a qualified specialist workshop immedi-
ately.
For further information on occupant safety, see (Y page 38).
Engine
Problem Possible causes/consequences and M Solutions
;
The yellow engine diag-
nostics warning lamp
lights up while the
engine is running.
There may be a fault, for example:
R
in the engine management
R
in the fuel injection system
R
in the exhaust system
R
in the ignition system (for vehicles with petrol engines)
R
in the fuel system
The emission limit values may be exceeded and the engine may
be running in emergency mode.
X
Have the vehicle checked as soon as possible at a qualified
specialist workshop.
Vehicles with a diesel engine: the fuel tank has been run dry
(Y page 143).
X
Start the engine three to four times after refuelling.
If the yellow engine diagnostics warning lamp goes out, emer-
gency running mode is cancelled. The vehicle need not be
checked.
238
Warning and indicator lamps in the instrument cluster
On-board computer and displays
Problem Possible causes/consequences and M Solutions
æ
The yellow reserve fuel
warning lamp lights up
while the engine is run-
ning.
The fuel level has dropped into the reserve range.
X
Refuel at the nearest filling station.
?
The red coolant warn-
ing lamp lights up while
the engine is running
and the coolant tem-
perature gauge is at the
start of the scale.
The temperature sensor for the coolant temperature gauge is
faulty.
The coolant temperature is no longer being monitored. There is a
risk of engine damage if the coolant temperature is too high.
X
Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine. Do not continue driving
under any circumstances.
X
Apply the parking brake.
X
Consult a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster
239
On-board computer and displays
Z
Problem Possible causes/consequences and M Solutions
?
The red coolant warn-
ing lamp comes on
while the engine is run-
ning.
The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator
may be blocked or the electric engine radiator fan may be mal-
functioning.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X
Observe the additional display messages in the multifunction
display.
X
Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X
Engage the electric parking brake.
X
Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X
Check the coolant level and top up the coolant (Y page 265).
Observe the warning notes as you do so.
X
If you have to top up the coolant frequently, have the engine
cooling system checked.
X
Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X
Do not start the engine again until the coolant temperature is
under 120 †. The engine may otherwise be damaged.
X
Drive to the nearest qualified specialist workshop.
X
Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop-start traffic.
?
The red coolant warn-
ing lamp comes on
while the engine is run-
ning. A warning tone
also sounds.
The coolant temperature has exceeded 120 †. The airflow to the
engine radiator may be blocked or the coolant level may be too
low.
G
WARNING
The engine is not being cooled sufficiently and may be damaged.
Do not drive when your engine is overheated. This can cause some
fluids which may have leaked into the engine compartmentto
catch fire.
Steamfrom the overheated engine can also cause serious burns
which can occur just by opening the bonnet.
There is a risk of injury.
X
Observe the additional display messages in the multifunction
display.
X
Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X
Engage the electric parking brake.
240
Warning and indicator lamps in the instrument cluster
On-board computer and displays
Problem Possible causes/consequences and M Solutions
X
Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X
Check the coolant level and top up the coolant (Y page 265).
Observe the warning notes as you do so.
X
If you have to top up the coolant frequently, have the engine
cooling system checked.
X
Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X
If the coolant temperature is less than 120 †, you can continue
driving to the nearest qualified specialist workshop.
X
Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop-start traffic.
Driving systems
Problem Possible causes/consequences and M Solutions
·
The red distance warn-
ing lamp lights up while
the vehicle is in motion.
The distance to the vehicle in front is too small for the speed
selected.
X
Increase the distance.
·
The red distance warn-
ing lamp lights up while
the vehicle is in motion.
Awarning tone also
sounds.
You are approaching a vehicle or a stationary obstacle in your line
of travel at too high a speed.
X
Be prepared to brake immediately.
X
Pay careful attention to the traffic situation. You may have to
brake or take evasive action.
Warning and indicator lamps in the instrument cluster
241
On-board computer and displays
Z
242

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Useful information Important safety notes Displays and operation Menus and submenus Display messages Warning and indicator lamps in the instrument cluster

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