2007-2013 Mercedes C Class 4 Door Driving and parking -> Driving systems User Manual
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Driving and parking -> Driving systems for Your Mercedes C Class 4 Door Second Generation (2007-2013)

Winter driving
Important safety notes
G
WARNING
If you shift downonaslippery road surface in
an attempt to increase the engine's braking
effect, the drive wheels could lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine
braking on a slippery road surface.
G
DANGER
If the exhaust pipe is blocked or adequate
ventilation is not possible, poisonous gases
such as carbon monoxide (CO) may enter the
vehicle. This is the case, e.g. if the vehicle
becomes trapped in snow. There is a risk of
fatal injury.
If you leave the engine or the auxiliary heating
running, make sure the exhaust pipe and area
around the vehicle are clear of snow. To
ensure an adequate supply of fresh air, open
a window on the side of the vehicle that is not
facing into the wind.
Have your vehicle winterproofed at a qualified
specialist workshop at the onset of winter.
Observe the notes in the "Winter operation"
section (Y page 312).
Driving with summer tires
Observe the notes in the "Winter operation"
section (Y page 312).
Slippery road surfaces
G
WARNING
If you shift down on a slippery road surface in
an attempt to increase the engine's braking
effect, the drive wheels could lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine
braking on a slippery road surface.
Drive particularly carefully on slippery road
surfaces. Avoid sudden acceleration, steering
and braking maneuvers. Do not use the cruise
control or DISTRONIC PLUS.
If the vehicle threatens to skid or cannot be
stopped when moving at low speed:
X
Shift the transmission to position N.
i
For more information on driving with
snow chains, see (Y page 313).
The outside temperature indicator is not
designed to serve as an ice-warning device
and is therefore unsuitable for that purpose.
Changes in the outside temperature are
displayed after a short delay.
Indicated temperatures just above the
freezing point do not guarantee that the road
surface is free of ice. The road may still be icy,
especially in wooded areas or on bridges. The
vehicle could skid if you fail to adaptyour
driving style. Always adapt your driving style
and drive at a speed to suit the prevailing
weather conditions.
You should pay special attention to road
conditions when temperatures are around
freezing point.
Driving systems
Cruise Control
Important safety notes
Cruise control maintains a constant road
speed for you. It brakes automatically in order
to avoid exceeding the set speed. On long and
steep downhill gradients, especially if the
vehicle is laden, you must select shift range
1, 2 or 3 in good time. By doing so, you will
make use of the braking effect of the engine.
This relieves the load on the brake system and
prevents the brakes from overheating and
wearing too quickly.
Use cruise control only if road and traffic
conditions make it appropriate to maintain a
steady speed for a prolonged period. You can
Driving systems
165
Driving and parking
Z
store any road speed above 20 mph
(30 km/h).
If you fail to adaptyour driving style, cruise
control can neither reduce the risk of an
accident nor override the laws of physics.
Cruise control cannot take into account the
road, traffic and weather conditions. Cruise
control is only an aid. You are responsible for
the distance to the vehicle in front, for vehicle
speed, for braking in good time and for
staying in your lane.
Do not use cruise control:
R
in road and traffic conditions which do not
allow you to maintain a constant speed e.g.
in heavy traffic or on winding roads
R
on slippery road surfaces. Braking or
accelerating could cause the drive wheels
to lose traction and the vehicle could then
skid
R
when there is poor visibility, e.g. due to fog,
heavy rain or snow
If there is a change of drivers, advise the new
driver of the speed stored.
Cruise control lever
:
To activate or increase speed
;
To activate or reduce speed
=
To deactivate cruise control
?
To activate at the current speed/last
stored speed
When you activate cruise control, the stored
speed is shown in the multifunction display
for five seconds. In the multifunction display,
the segments between the stored speed and
the maximum speed light up.
Storing and maintaining the current
speed
You can store the current speed if you are
driving faster than 20 mph (30 km/h).
X
Accelerate the vehicle to the desired
speed.
X
Briefly press the cruise control lever
up : or down ;.
X
Remove your foot from the accelerator
pedal.
Cruise control is activated. The vehicle
automatically maintains the stored speed.
i
Cruise control may be unable to maintain
the stored speed on uphill gradients. The
stored speed is resumed when the gradient
evens out. Cruise control maintains the
stored speed on downhill gradients by
automatically applying the brakes.
Storing the current speed or calling up
the last stored speed
G
WARNING
If you call up the stored speed and it differs
from the current speed, the vehicle
accelerates or decelerates. If you do not know
the stored speed, the vehicle could accelerate
or brake unexpectedly. There is a risk of an
accident.
Pay attention to the road and traffic
conditions before calling up the stored speed.
If you do not know the stored speed, store the
desired speed again.
X
Briefly pull the cruise control lever towards
you ?.
X
Remove your foot from the accelerator
pedal.
The first time cruise control is activated, it
stores the current speed or regulates the
speed of the vehicle to the previously
stored speed.
166
Driving systems
Driving and parking
Setting aspeed
Keep in mind thatitmay take a briefmoment
until the vehicle has accelerated or braked to
the speed set.
X
Press the cruise control lever up : for a
higher speed or down ; for a lower speed.
X
To adjust the set speed in 1 mph
increments (1 km/h increments): briefly
press the cruise control lever up : or
down ; to the pressure point.
Every time the cruise control lever is
pressed up : or down ; the last speed
stored is increased or reduced.
X
To adjust the set speed in 5 mph
increments (10 km/h increments):
briefly press the cruise control lever
up : or down ; beyond the pressure
point.
Every time the cruise control lever is
pressed up : or down ; the last speed
stored is increased or reduced.
i
Cruise control is not deactivated if you
depress the accelerator pedal. For
example, if you accelerate briefly to
overtake, cruise control adjusts the
vehicle's speed to the last speed stored
after you have finished overtaking.
Deactivating cruise control
There are several ways to deactivate cruise
control:
X
Briefly press the cruise control lever
forwards =.
or
X
Brake.
Cruise control is automatically deactivated if:
R
you depress the parking brake.
R
you are driving at less than 20 mph
(30 km/h).
R
ESP
®
intervenes or you deactivate ESP
®
.
R
you shift the transmission to position N
while driving.
If cruise control is deactivated, you will hear
a warning tone. You will see the
Cruise
Control Off message in the multifunction
display for approximately five seconds.
i
When you switch off the engine, the last
speed stored is cleared.
DISTRONIC PLUS
Important safety notes
DISTRONIC PLUS regulates the speed and
automatically helps you maintain the
distance to the vehicle detected in front.
DISTRONIC PLUS brakes automatically so
that the set speed is not exceeded.
On long and steep downhill gradients,
especially if the vehicle is laden, you must
select shift range 1, 2 or 3 in good time. By
doing so, you will make use of the braking
effect of the engine. This relieves the load on
the brake system and prevents the brakes
from overheating and wearing too quickly.
If DISTRONIC PLUS detects a slower-moving
vehicle in front, your vehicle is braked in order
to maintain the preset distance to the vehicle
in front.
G
WARNING
DISTRONIC PLUS does not react to:
R
people or animals
R
stationary obstacles on the road, e.g.
stopped or parked vehicles
R
oncoming and crossingtraffic
As a result, DISTRONIC PLUS may neither give
warnings nor intervene in such situations.
There is a risk of an accident.
Always pay careful attention to the traffic
situation and be ready to brake.
G
WARNING
DISTRONIC PLUS cannot always clearly
identify other road users and complextraffic
situations.
Driving systems
167
Driving and parking
Z
In such cases, DISTRONIC PLUS may:
R
give an unnecessary warning and then
brake the vehicle
R
neither give a warning nor intervene
R
accelerate unexpectedly
There is a risk of an accident.
Continue to drive carefully and be ready to
brake, in particular when warned to do so by
DISTRONIC PLUS.
G
WARNING
DISTRONIC PLUS brakes yourvehicle with up
to 40% of the maximum braking force. If this
braking force is insufficient, DISTRONIC PLUS
warns you visually and audibly.There is a risk
of an accident.
In such cases, apply the brakes yourself and
try to take evasive action.
!
If DISTRONIC PLUS or the HOLD function
is activated, the vehicle brakes
automatically in certain situations. To
prevent damage to the vehicle, deactivate
DISTRONIC PLUS and the HOLD function in
the following or other similar situations:
R
when towing the vehicle
R
in the car wash
If you fail to adapt your driving style,
DISTRONIC PLUS can neither reduce the risk
of accident nor override the laws of physics.
DISTRONIC PLUS cannot take into account
the road, traffic and weather conditions.
DISTRONIC PLUS is only an aid. You are
responsible for the distance to the vehicle in
front, for vehicle speed, for braking in good
time and for staying in your lane.
Do not use DISTRONIC PLUS:
R
in road and traffic conditions which do not
allow you to maintain a constant speed e.g.
in heavy traffic or on winding roads
R
on slippery road surfaces. Braking or
accelerating could cause the drive wheels
to lose traction and the vehicle could then
skid
R
when there is poor visibility, e.g. due to fog,
heavy rain or snow
DISTRONIC PLUS may not detect narrow
vehicles driving in front, e.g. motorcycles, or
vehicles driving on a different line.
In particular, the detection of obstacles can
be impaired if:
R
dirt on the sensors or anything else
covering the sensors
R
snow or heavy rain
R
interference by other radar sources
R
strong radar reflections, for example, in
parking garages
If DISTRONIC PLUS no longer detects a
vehicle in front, DISTRONIC PLUS may
unexpectedly accelerate the vehicle to the
stored speed.
This speed may:
R
be too high if you are driving in a filter lane
or an exit lane
R
be so high when driving in the right-hand
lane that you overtake vehicles in the left-
hand lane
R
be so high when driving in the left-hand lane
that you overtake vehicles in the right-hand
lane
If there is a change of drivers, advise the new
driver of the speed stored.
For DISTRONIC PLUS to assist you when
driving, the radar sensor system must be:
R
activated (Y page 211)
R
operational
If there is no vehicle in front, DISTRONIC
PLUS operates in the same way as cruise
control in the speed range between 20 mph
(Canada: 30 km/h) and 120 mph (Canada:
200 km/h). If a vehicle is driving in front of
you, it operates in the speed range between
0 mph (0 km/h) and 120 mph (Canada:
200 km/h).
Do not use DISTRONIC PLUS while driving on
roads with steep gradients.
168
Driving systems
Driving and parking
As DISTRONIC PLUS transmits radar waves,
it can resemble the radar detectors of the
responsible authorities. You can refer to the
relevant chapterinthe Operator's Manual if
questions are asked about this.
i
USA only:
This device has been approved by the FCC
as a "VehicularRadar System". The radar
sensor is intended for use in an automotive
radar system only. Removing, tampering
with, or altering the device will void any
warranties, and is notpermitted by the
FCC. Do not tamper with, alter, or use in
any non-approved way.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
i
Canada only: This device complies with
RSS-210 of Industry Canada. Operation is
subject to the following two conditions:
1. This device may not cause harmful
interference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation of the device.
Removal, tampering, or altering of the
device will void any warranties, and is not
permitted. Do not tamper with, alter, or use
in any non-approved way.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
Cruise control lever
:
To store the currentspeed or a higher
speed
;
To store the currentspeed or a lower
speed
=
To deactivate DISTRONIC PLUS
?
To store the currentspeed or call up the
last stored speed
A
To set the specified minimum distance
Switching on DISTRONIC PLUS, storing
and maintaining the current speed
Activation conditions
In order to activate DISTRONIC PLUS, the
following conditions must be fulfilled:
R
the engine must be started. It may take up
to two minutes after pulling away before
DISTRONIC PLUS is operational.
R
the parking brake must be released.
R
ESP
®
must be active, but not intervening.
R
the transmission must be in position D.
R
the hood must be closed.
R
the driver's door must be closed when you
shift from P to D or your seat belt must be
fastened.
R
the front-passenger door and rear doors
must be closed.
R
the vehicle must not skid.
Activating while driving
You can only activate DISTRONIC PLUS when
driving at speeds below 20 mph (30km/h) if
the vehicle in front has been detected and is
Driving systems
169
Driving and parking
Z
shown in the multifunction display. If the
vehicle in front is no longer detected and
displayed, DISTRONIC PLUS switches off and
a tone sounds.
X
Briefly pull the cruise control lever towards
you ?, or press it up : or down ;.
DISTRONIC PLUS is selected.
X
Press the cruise control lever repeatedly
up : or down ; until the desired speed
is set.
X
Remove your foot from the accelerator
pedal.
Your vehicle adapts its speed to that of the
vehicle in front, but only up to the desired
stored speed.
i
If you do not fully release the accelerator
pedal, the
DISTRONIC PLUS Override
message appears in the multifunction
display. The set distance to a slower-
moving vehicle in front will then not be
maintained. You will be driving at the speed
you determine by the position of the
accelerator pedal.
Activating when driving towards a
stationary vehicle
If the vehicle in front of you is stationary, you
can only activate DISTRONIC PLUS once your
vehicle is stationary as well.
X
Briefly pull the cruise control lever towards
you ?, or press it up : or down ;.
DISTRONIC PLUS is selected.
i
DISTRONIC PLUS can only be activated at
under 20 mph (30 km/h) if avehicle in front
has been detected. Therefore, the
DISTRONIC PLUS distance display in the
instrument cluster should be activated
(Y page 206).
X
Press the cruise control lever repeatedly
up : or down ; until the desired speed
is set.
i
You can use the cruise control lever to set
the stored speed and the control on the
cruise control lever to set the specified
minimum distance (Y page 172).
Pulling away
X
If the vehicle in front pulls away: remove
your foot from the brake pedal.
X
Briefly pull the cruise control lever towards
you ?.
or
X
Accelerate briefly.
Your vehicle pulls away and adapts its
speed to that of the vehicle in front.
Driving
If there is no vehicle in front, DISTRONIC
PLUS operates in the same way as cruise
control.
If DISTRONIC PLUS detects that the vehicle
in fronthas slowed down, it brakes your
vehicle.Inthis way, the distance you have
selected is maintained.
If DISTRONIC PLUS detects that the vehicle
in front is driving faster, it accelerates your
vehicle, but only up to the speed you have
stored.
Changing lanes
If you change to the passing lane, DISTRONIC
PLUS supports you when:
R
you are driving faster than 40 mph
(60 km/h)
R
DISTRONIC PLUS is maintaining the
distance to a vehicle in front
R
you switch on the appropriate turn signal
R
DISTRONIC PLUS does not detect a danger
of collision
If these conditions are fulfilled, your vehicle
is accelerated. Acceleration will be
interrupted if changing lanes takes too long
or if the distance between your vehicle and
the vehicle in front becomes too small.
i
When changing lanes, DISTRONIC PLUS
monitors the left lane on left-hand drive
vehicles and the right lane on right-hand
drive vehicles.
170
Driving systems
Driving and parking
Stopping
G
WARNING
When leaving the vehicle, even if it is braked
only by DISTRONIC PLUS, it could roll away if:
R
there is a malfunction in the system or in
the voltage supply.
R
DISTRONIC PLUS has been deactivated
with the cruise control lever, e.g. by a
vehicle occupant or from outside the
vehicle.
R
the electrical system in the engine
compartment, the battery or the fuses have
been tampered with.
R
the battery is disconnected.
R
the accelerator pedal has been depressed,
e.g. by a vehicle occupant.
There is a risk of an accident.
If you wish to exit the vehicle, always turn off
DISTRONIC PLUS and secure the vehicle
against rolling away.
Deactivating DISTRONIC PLUS
(Y page 173).
If DISTRONIC PLUS detects that the vehicle
in front is stopping, it brakes your vehicle until
it is stationary.
Once your vehicle is stationary, it remains
stationary and you do not need to depress the
brake.
i
Depending on the specified minimum
distance, your vehicle will come to a
standstill at a sufficient distance behind the
vehicle in front.The specified minimum
distance is set using the control on the
cruise control lever.
You will see a warning message in the
multifunction display if DISTRONIC PLUS is
activated and:
R
the driver's door is open and the driver's
seat belt is unfastened.
R
the engine is switched off.
R
the hood is opened.
Shift to 'P'
X
Shift the transmission to position P to
prevent the vehicle from rolling away.
DISTRONIC PLUS is deactivated. The
warning message in the multifunction
display disappears.
The horn will also sound at regular intervals if
DISTRONIC PLUS is activated and you:
R
switch the engine off, open the driver's
door and remove your seat belt
R
open the hood
The sounding of the horn alerts you to the fact
that the vehicle has been parked while
DISTRONIC PLUS is still activated. The sound
becomes louder if you attempt to lock the
vehicle. The vehicle is not locked until
DISTRONIC PLUS is deactivated.
i
If the engine has been switched off, it
cannot be started again until DISTRONIC
PLUS has been deactivated.
If DISTRONIC PLUS is activated and a
malfunction occurs in the system or if there
is a disruption in the power supply, the
Brake Immediately message is shown in
the multifunction display. Depress the brake
firmly immediately until the warning message
disappears from the multifunction display or
shift the transmission to position P.
DISTRONIC PLUS is then deactivated.
Setting aspeed
X
Press the cruise control lever up : for a
higherspeed or down ; for a lower speed.
X
To adjust the set speed in 1 mph
increments (1 km/h increments): briefly
press the cruise control lever up : or
down ; to the pressure point.
Every time the cruise control lever is
pressed up : or down ; the last speed
stored is increased or reduced.
X
To adjust the set speed in 5 mph
increments (10 km/h increments):
briefly press the cruise control lever
Driving systems
171
Driving and parking
Z
up : or down ; beyond the pressure
point.
Every time the cruise control lever is
pressed up : or down ;, the last speed
stored is increased or reduced.
i
DISTRONIC PLUSis not deactivated if you
depress the accelerator pedal.Ifyou
accelerate to overtake, DISTRONIC PLUS
adjusts the vehicle's speed to the last
speed stored after you have finished
overtaking.
Storing the current speed or calling up
a stored speed
X
Briefly pull the cruise control lever towards
you ?.
X
Remove your foot from the accelerator
pedal.
DISTRONIC PLUS is activated. The first
time it is activated, the current speed is
stored. Otherwise, it sets the vehicle cruise
speed to the previously stored value.
Setting the specified minimum distance
You can set the specified minimum distance
for DISTRONIC PLUS by varying the time span
between one and two seconds. With this
function, you can set the minimum distance
that DISTRONIC PLUS keeps to the vehicle in
front, dependent on vehicle speed. You can
see this distance in the multifunction display
(Y page 173).
i
Make sure that you maintain a sufficient
distance to the vehicle in front and comply
with the minimum distance as required by
law. Adjust the distance to the vehicle in
front if necessary.
X
To increase: turn control ; in direction
=.
DISTRONIC PLUS then maintains a greater
distance between your vehicle and the
vehicle in front.
X
To decrease: turn control ; in
direction :.
DISTRONIC PLUS then maintains a shorter
distance between your vehicle and the
vehicle in front.
DISTRONIC PLUS displays in the
speedometer
When DISTRONIC PLUS is activated, one or
two segments ; in the set speed range light
up.
i
For design reasons, the speed displayed
in the speedometer may differ slightly from
the speed set for DISTRONIC PLUS.
If DISTRONIC PLUS detectsavehicle in front,
segments ; between speed of the vehicle in
front : and stored speed = light up.
172
Driving systems
Driving and parking
DISTRONIC PLUS displays in the
multifunction display
General notes
In the Assistance menu(Ypage 206) of the
on-board computer, you can select the
distance display.
Display when DISTRONIC PLUS is
deactivated
X
Select the
Distance Display function
using the on-board computer
(Y page 206).
When DISTRONIC PLUS is deactivated, you
will see the following in the multifunction
display:
:
Symbol for the activated PRE-SAFE
®
Brake
;
Vehicle in front, if detected
=
Distance indicator, current distance to
the vehicle in front
?
Specified minimum distance to the
vehicle in front; adjustable
A
Own vehicle
Display when DISTRONIC PLUS is
activated
X
Select the
Distance Display function
using the on-board computer
(Y page 206).
You will see the stored speed for about five
seconds when you activate DISTRONIC PLUS.
After this time, you will see the following in
the multifunction display while DISTRONIC
PLUS is activated:
:
DISTRONIC PLUS activated
;
Own vehicle
=
Specified minimum distance to the
vehicle in front; adjustable
?
Vehicle in front, if detected
Deactivating DISTRONIC PLUS
There are several ways to deactivate
DISTRONIC PLUS:
X
Briefly press the cruise control lever
forwards :.
or
X
Brake, unless the vehicle is stationary.
When you deactivate DISTRONIC PLUS, you
will see the
DISTRONIC PLUS Off
message
in the multifunction display for approximately
five seconds.
i
The last speed stored remains stored until
you switch off the engine.
Driving systems
173
Driving and parking
Z
DISTRONIC PLUSis automatically
deactivated if:
R
you engage the parking brake
R
you are driving slower than 15 mph
(25 km/h) and there is no vehicle in front,
or if the vehicle in front is no longer
detected
R
ESP
®
intervenes or you deactivate ESP
®
R
the transmission is in the P, R or N position
R
you switch off the radar sensor system
(Y page 211)
R
you pull the cruise control lever towards
you in order to pull awayand the front-
passengerdoor or one of the rear doors is
open
R
the vehicle has skidded
If DISTRONIC PLUS is deactivated, you will
hear a warning tone. You will see the
DISTRONIC PLUS Off
message in the
multifunction display for approximately five
seconds.
If the vehicle has been stopped by DISTRONIC
PLUS and a malfunction occurs in the system,
the
Brake Immediately message appears in
the multifunction display.Depress the brake
pedal immediately so that the vehicle does
not roll away. DISTRONIC PLUS is then
deactivated, and the message disappears.
Tips for driving with DISTRONIC PLUS
General notes
The following contains descriptions of certain
road and traffic conditions in which you must
be particularly attentive. In such situations,
brake if necessary. DISTRONIC PLUS is then
deactivated.
Cornering, going into and coming out of a
bend
The ability of DISTRONIC PLUS to detect
vehicles when cornering is limited. Your
vehicle may brake unexpectedly or late.
Vehicles traveling on adifferent line
DISTRONIC PLUS may not detect vehicles
traveling on a different line. The distance to
the vehicle in frontwill be too short.
Other vehicles changing lanes
174
Driving systems
Driving and parking
DISTRONIC PLUS has not detected the
vehicle cutting in yet. The distance to this
vehicle will be too short.
Narrow vehicles
DISTRONIC PLUS has not yet detected the
vehicle in front on the edge of the road,
because of its narrow width.The distance to
the vehicle in front will be too short.
Obstructions and stationary vehicles
DISTRONIC PLUS does not brake for
obstacles or stationary vehicles. If, for
example, the detected vehicle turns a corner
and reveals an obstacle or stationary vehicle,
DISTRONIC PLUS will not brake for these.
Crossing vehicles
DISTRONIC PLUS may mistakenly detect
vehicles that are crossing your lane.
Activating DISTRONIC PLUS at traffic lights
with crossing traffic, for example, could cause
your vehicle to pull away unintentionally.
Dynamic handling package with
sports mode
General notes
The most important part of the dynamic
handling package with sports mode is the
adjustable damping system. This
automatically controls and adapts the
suspension to the respective driving
situation.
The calibration of the suspension depends
on:
R
your driving style
R
the road surface conditions
R
your individual selection; see the following
description
If your vehicle is equipped with automatic
transmission, the dynamic handling package
with sports mode also includes steering
wheel paddle shifters (Y page 151) with a
manual drive program (Y page 153).
Driving systems
175
Driving and parking
Z
Example: positionofdynamic handling package
with sports mode button
X
Start the engine.
Sports tuning
The firmer setting of the suspension tuning in
sports mode ensures evenbetter contact
with the road. Select this mode when
employing a sporty driving style, e.g. on
winding country roads.
Your selection remains stored until you
switch off the engine.
X
Press button ;.
Indicator lamp : lights up. Sports
suspension tuning is selected. Depending
on the engine output, the accelerator pedal
is more responsive. On vehicles with
automatic transmission, drive program S is
selected.
Comfort tuning
In Comfort mode, the driving characteristics
of your vehicle are more comfortable.
Therefore, select this mode if you favor a
more comfortable driving style. Select
comfort mode also when driving fast on
straight roads, e.g. on straight stretches of
freeway.
X
Press button ;.
Indicator lamp : goes out. Comfortable
suspension tuning is selected. On vehicles
with automatic transmission,drive
program E is selected.
HOLD function
Important safety notes
G
WARNING
When leaving the vehicle, it can still roll away
despite being braked by the HOLD function if:
R
there is a malfunction in the system or in
the voltage supply.
R
the HOLD function has been deactivated by
pressing the accelerator pedalorthe brake
pedal, e.g. by a vehicle occupant.
R
the electrical system in the engine
compartment, the battery or the fuses have
been tampered with.
R
the battery is disconnected
There is a risk of an accident.
If you wish to exit the vehicle, always turn off
the HOLD function and secure the vehicle
against rolling away.
!
If DISTRONIC PLUS or the HOLD function
is activated, the vehicle brakes
automatically in certain situations. To
prevent damage to the vehicle, deactivate
DISTRONIC PLUS and the HOLD function in
the following or other similar situations:
R
when towing the vehicle
R
in the car wash
Deactivate the HOLD function (Y page 177).
General notes
The HOLD function can assist the driver in the
following situations:
R
when pulling away, especially on steep
slopes
R
when maneuvering on steep slopes
R
when waiting in traffic
The vehicle is kept stationary without the
driver having to depress the brake pedal.
The braking effect is canceled and the HOLD
function deactivated when you depress the
accelerator pedal to pull away.
176
Driving systems
Driving and parking
Activation conditions
You can activate the HOLD function if:
R
the vehicle is stationary
R
the engine is running or if it has been
automatically switched off by the ECO
start/stop function
R
the driver's door is closed or your seat belt
is fastened
R
the parking brake is released
R
the hood is closed
R
the transmission is in position D, R or N
R
DISTRONIC PLUS is deactivated
Activating the HOLD function
X
Make sure that the activation conditions
are met.
X
Depress the brake pedal.
X
Quickly depress the brake pedal further
until ë appears in the multifunction
display.
The HOLD function is activated. You can
release the brake pedal.
i
If depressing the brake pedal the first
time does not activate the HOLD function,
wait briefly and then try again.
Deactivating the HOLD function
The HOLD function is deactivated
automatically if:
R
you accelerate and the transmission is in
position D or R
R
the transmission is in position P.
R
you depress the brake pedal again with a
certain amountofpressure until ë
disappears from the multifunction display
R
you activate DISTRONIC PLUS
You will see a warning message in the
multifunction display if the HOLD function is
activated and:
R
the driver's door is open and the driver's
seat beltis unfastened.
R
the engine is switched off, unless it is
automatically switched off by the ECO
start/stop function.
R
the hood is opened.
Shift to 'P'
X
Shift the transmission to position P to
prevent the vehicle from rolling away.
The HOLD function is deactivated. The
warning message in the multifunction
display disappears.
The horn will also sound at regularintervals if
the HOLD function is activated and you:
R
switch the engine off, open the driver's
door and remove your seatbelt
R
open the hood
The sounding of the horn alerts you to the fact
that the vehicle has been parked while the
HOLD function is still activated. If you attempt
to lock the vehicle, the tone becomes louder.
The vehicle is not locked until the HOLD
function is deactivated.
i
If the engine has been switched off, it
cannot be started again until the HOLD
function has been deactivated.
If there is a malfunction in the system or
power supply while the HOLD function is
activated, the
Brake Immediately message
is shown in the multifunction display.
Immediately depress the brake firmly until
the warning message in the multifunction
display goes out.
You can also shift the transmission to position
P. This deactivates the HOLD function.
RACE START
Important safety notes
i
Observe the safety notes for the SPORT
handling mode (Y page 68).
RACE START is intended solely for activation
on dedicated race circuits. Always adapt your
Driving systems
177
Driving and parking
Z
speed and driving style to the prevailing road
and weather conditions.
RACE START enables optimal acceleration
from a standing start. The precondition for
this is a suitable high-grip road surface.
i
RACE START is only available in AMG
vehicles.
Conditions for activation
You can activate RACE START if:
R
the doors are closed
R
the engine is running and it has reached an
operating temperature of approximately
176 ‡ (80 †) This is the case when the
engine oil temperature in the multifunction
display stops flashing.
R
SPORT handling mode is activated
(Y page 68)
R
the steering wheel is in the straight-ahead
position
R
the vehicle is stationary and the brake
pedal is depressed (left foot)
R
the transmission is in position D
Activating RACE START
X
Depress the brake pedal with your left foot
and keep it depressed.
X
Turn the drive program selector clockwise
(Y page 150) until the RS lamp lights up.
The
RACE START Confirm: Paddle UP
Cancel: Paddle DOWN message appears
in the multifunction display.
i
If the activation conditions are no longer
fulfilled, RACE START is canceled. The
multifunction display shows the
RACE
START Canceled message.
X
To cancel: pull the left steering wheel
paddle shifter (Y page 151).
or
X
To confirm: pull the right steering wheel
paddle shifter (Y page 151).
The
RACE START Available Depress
gas pedal message appears in the
multifunction display.
i
If you do not depress the accelerator
pedal fully within two seconds, RACE
START is canceled. The
RACE START Not
Possible See Operator's Manual
message appears in the multifunction
display.
X
Fully depress the accelerator pedal.
The engine speed rises to approximately
3,500 rpm.
The
RACE START Release brake to
start message appears in the
multifunction display.
i
If you do not release the brake pedal
within five seconds, RACE START is
canceled. The multifunction display shows
the
RACE START Canceled message.
X
Take your foot off the brake, but keep the
accelerator pedal depressed.
The vehicle pulls away at maximum
acceleration.
The
RACE START Active message appears
in the multifunction display.
RACE START is deactivated when the vehicle
reaches a speed of approximately 30 mph
(Canada: 50 km/h). Drive program S+ is
activated. SPORT handling mode remains
activated.
RACE START is deactivated immediately if
you release the accelerator pedal during
RACE START or if any of the activation
conditions are no longer fulfilled. The
RACE
START Not Possible See Operator's
Manual message appears in the multifunction
display.
i
If RACE START is used repeatedly within
a short period of time, it is only available
178
Driving systems
Driving and parking
again after the vehicle has been driven a
certain distance.
4MATIC (permanent four-wheel drive)
If you fail to adapt your driving style, 4MATIC
can neither reduce the risk of accident nor
override the laws of physics. 4MATIC cannot
take account of road, weather and traffic
conditions. 4MATIC is only an aid. You are
responsible for the distance to the vehicle in
front, for vehicle speed, for braking in good
time and for staying in your lane.
If a drive wheel spins due to insufficient grip:
R
Only depress the acceleratorpedal as far
as necessary when pulling away.
R
Accelerate less when driving.
!
Never tow the vehicle with one axle
raised. This may damage the transfer case.
Damage of this sort is not covered by the
Mercedes-Benz Limited Warranty. All
wheels must remain either on the ground
or be fully raised. Observe the instructions
for towing the vehicle with all wheels in full
contact with the ground.
4MATIC ensures that all four wheels are
permanently driven. Together with ESP
®
, it
improves the traction of your vehicle
whenever a drive wheel spins due to
insufficient grip.
i
In wintry driving conditions, the maximum
effect of 4MATIC can only be achieved if
you use winter tires (M+S tires), with snow
chains if necessary.
PARKTRONIC
Important safety notes
PARKTRONIC is an electronic parking aid with
ultrasonicsensors. It indicates visually and
audibly the distance between your vehicle
and an object.
PARKTRONIC is only an aid. It is not a
replacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering, parking
and exiting a parking space. When
maneuvering, parking or pulling out of a
parking space, make sure that there are no
persons, animals or objects in the area in
which you are maneuvering.
!
When parking, pay particular attention to
objects above or below the sensors, such
as flower pots or trailer drawbars.
PARKTRONIC does not detectsuch objects
when they are in the immediate vicinity of
the vehicle. You could damagethe vehicle
or the objects.
The sensors may not detect snow and other
objects that absorb ultrasonic waves.
Ultrasonic sources such as an automatic
car wash, the compressed-air brakes on a
truck or a pneumatic drill could cause
PARKTRONIC to malfunction.
PARKTRONIC may not function correctly on
uneven terrain.
PARKTRONIC is activated automatically when
you:
R
switch on the ignition
R
shift the transmission to position D, R or N
R
release the parking brake
PARKTRONIC is deactivated at speeds above
11 mph (18 km/h). It is reactivated at lower
speeds.
PARKTRONIC monitors the area around your
vehicle using six sensors in the front and four
sensors in the rear.
Driving systems
179
Driving and parking
Z
:
Sensors in the front bumper, left-hand
side (example)
Range of the sensors
General notes
PARKTRONIC does not take objects into
consideration thatare:
R
below the detection range, e.g. people,
animals or objects
R
above the detection range, e.g.
overhanging loads, truck overhangs or
loading ramps
The sensors must be free from dirt, ice or
slush. They can otherwise not function
correctly. Clean the sensors regularly, taking
care not to scratch or damage them
(Y page 291).
Side view
Top view
Frontsensors
Center Approx. 40 in (approx.
100 cm)
Corners Approx. 24 in (approx.
60 cm)
Rearsensors
Center Approx. 48 in (approx.
120 cm)
Corners Approx. 32 in (approx.
80 cm)
Minimum distance
Center Approx.8in (approx.
20 cm)
Corners Approx.6in (approx.
15 cm)
If there is an obstacle withinthis range, the
relevant warning displays light up and a
warning tone sounds. If the distance falls
below the minimum, the distance may no
longer be shown.
Warning displays
The warning displays show the distance
between the sensors and the obstacle. The
warning display for the front area is located
on the dashboard above the center air vents.
The warning display for the rear area is
180
Driving systems
Driving and parking
located on the headliner in the rear
compartment.
Warning display for the front area
:
Segments on the left-hand side of the
vehicle
;
Segments on the right-hand side of the
vehicle
=
Segments showing operational readiness
The warning display for each side of the
vehicle is divided into five yellow and two red
segments. PARKTRONIC is operational if
yellow segments showing operational
readiness = light up.
The selected transmission position and the
direction in which the vehicle is rolling
determine which warning display is active
when the engine is running.
Transmission
position
Warning display
D
Front area activated
R, N or the vehicle
is rolling
backwards
Rear and front areas
activated
P
No areas activated
One or more segments light up as the vehicle
approaches an obstacle, depending on the
vehicle's distance fromthe obstacle.
From the:
R
sixth segment onwards, you will hear an
intermittent warning tone for
approximately two seconds.
R
seventh segment onwards, you will hear a
warning tone for approximately two
seconds. This indicates that you have now
reached the minimum distance.
Deactivating/activating PARKTRONIC
:
Indicator lamp
;
Deactivating/activating PARKTRONIC
If indicator lamp : lights up, PARKTRONIC is
deactivated. Parking Guidance is also
deactivated.
i
PARKTRONIC is automatically activated
when you turn the SmartKey to position 2
in the ignition lock.
Driving systems
181
Driving and parking
Z
Problems with PARKTRONIC
Problem Possible causes/consequences and M Solutions
Only the red segments
in the PARKTRONIC
warning displays are lit.
You also hear a warning
tone for approximately
two seconds.
PARKTRONIC is
deactivated after
approximately
20 seconds, and the
indicator lamp in the
PARKTRONIC button
lights up.
PARKTRONIC has malfunctioned and has switched off.
X
If problems persist, have PARKTRONIC checked at a qualified
specialist workshop.
Only the red segments
in the PARKTRONIC
warning displays are lit.
PARKTRONIC is
deactivated after
approximately
20 seconds.
The PARKTRONIC sensors are dirty or there is interference.
X
Cleanthe PARKTRONIC sensors (Y page 291).
X
Switch the ignition back on.
The problem may be caused by an external source of radio or
ultrasound waves.
X
See if PARKTRONIC functions in a different location.
Parking Guidance
Important safety notes
Parking Guidance is an electronic parking aid
with ultrasound. Ultrasound is used to
measure the road on both sides of the vehicle.
Asuitable parking space is indicated by the
parking symbol. You receive steering
instructions when parking.You may also use
PARKTRONIC (Y page 179).
Parking Guidance is only an aid. It is not a
replacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering, parking
and exiting a parking space. When
maneuvering, parking or pulling out of a
parking space, make sure that there are no
persons, animals or objectsinthe area in
which you are maneuvering.
G
WARNING
If objects are located above the detection
range, Parking Guidance may provide steering
instructions too soon. You may cause a
collision as a result. There is a risk of an
accident.
If objects are located above the detection
range, stop and switch off Parking Assist.
!
Pay particular attention to low objects or
objects with flat surfaces, such as trailer
drawbars, posts, cross beams and curbs.
These types of objects cannot be detected
by Parking Guidance and may damage the
vehicle.
When PARKTRONIC is deactivated, Parking
Guidance is also unavailable.
182
Driving systems
Driving and parking
Use Parking Guidance for parking spaces:
R
that are parallel to the direction of travel
R
that are on straight roads, not bends
R
that are on the same level as the road, i.e.
not on the pavement, for example. Parking
Guidance may not detect flat curbs
Parking tips:
R
On narrow roads, drive as close to the
parking space as possible.
R
Parking spaces that are littered, overgrown
or partially occupied by trailer drawbars
might be identified incorrectly or not at all.
R
Snowfall or heavy rain may lead to a parking
space being measured inaccurately.
R
Pay attention to the PARKTRONIC
(Y page 180) warning messages during the
parking procedure.
R
When transporting a load which protrudes
from your vehicle, you must not use Parking
Guidance.
R
Never use Parking Guidance with snow
chains or an emergency spare wheel
mounted.
R
Make sure that the tire pressures are
always correct.This has adirecteffect on
the steering instructions.
R
The way yourvehicle is positioned in the
parking space after parkingis dependent
on various factors. These include the
position and shape of the vehicles parked
in front and behind it and the conditions of
the location. In some cases, Parking
Guidance may guide you too far or not far
enough into a parking space. In some
cases, it may also lead you across or onto
the curb. If necessary, cancel the parking
procedure with Parking Guidance.
!
If unavoidable, you should drive over
obstacles such as curbs slowly and not at
a sharp angle. Otherwise, you may damage
the wheels or tires.
Detecting parking spaces
:
Detected parking space on the left
;
Parking symbol
=
Detected parking space on the right
Parking Guidance is automatically activated
when you drive forwards. The system is
operational at speeds of up to approximately
22 mph (35 km/h). While in operation, the
system independently locates and measures
parking spaces on both sides of the vehicle.
When driving at speeds below 19 mph
(30 km/h), you will see parking symbol ; as
a status indicator in the instrument cluster.
When a parking space has been detected, an
arrow towards the right = or the left : also
appears. Parking Guidance only displays
parking spaces on the front-passenger side
as standard. Parking spaces on the driver's
side are displayed as soon as the turn signal
on the driver's side is activated. To park on
the driver's side, you must leave the driver's
side turn signal switched on until you have
engaged reverse gear.
Parking Guidance will only detect parking
spaces:
R
that are parallel to the direction of travel
R
that are at least 5 ft (1.5 m) wide
R
that are at least 4.3 ft (1.3 m) longer than
your vehicle
Aparking space is displayed while you are
driving past it, and until you are
approximately 50 ft (15 m) away from it.
Driving systems
183
Driving and parking
Z
Parking
X
Stop the vehicle when the parking space
symbol shows the desired parking space in
the instrument cluster.
X
Shift the transmission to position R.
The multifunction display shows the
Check Vehicle Surroundings Press
'OK' to Confirm message.
X
Press the a button on the multifunction
steering wheel to confirm.
The multifunction display switches to
Parking Guidance.
Depending on your distance from the
parking space, the
Please Drive
Backward message will appear in the
multifunction display.
X
If necessary, reverse towards the parking
space. This is indicated by an arrow
pointing backwards.
Continue backing up until you hear a tone.
Stop –the stop position has been reached.
The arrow is white.
The
Please Steer Wheel to the
Right or Please Steer Wheel to the
Left message appears in the multifunction
display.
X
While the vehicle is stationary, turn the
steering wheel in the specified direction
until the arrow is white and a warning tone
sounds.
X
To reverse into the parking space:
maintain the steering wheel angle and
reverse carefully.
X
Stop as soon as you hear a warning tone,
The vehicle has reached the position in
which you need to countersteer.
The
Please Steer Wheel to the Left
or Please Steer Wheel to the Right
message appears in the multifunction
display.
X
To countersteer: while the vehicle is
stationary, turn the steering wheel in the
specified direction until the arrow is white
and a warning tone sounds.
X
To reverse into the parking space:
maintain the steering wheel angle and
reverse carefully.
X
Stop as soon as you hear a warning tone,
at the latest when PARKTRONIC sounds the
continuous warning tone.
The
Parking Guidance Finished
message appears in the multifunction
display and a tone sounds. You may be
asked to steer in adifferent direction and
thenchange gear. In this case, further
displays in the multifunction display will
direct you to the final position.
X
Maneuver if necessary.
X
Always observe the warning messages
displayed by PARKTRONIC (Y page 180).
Canceling Parking Guidance
X
Press the PARKTRONIC button on the
center console (Y page 181).
Parking Guidance is canceled immediately
and PARKTRONIC is deactivated.
Parking Guidance is canceled automatically if
it is no longer possible to guide you into the
parking space, or if a malfunction occurs.
The parking space symbol goes out and a
warning tone sounds. The
Parking
Guidance Canceled message appears in the
multifunction display.
184
Driving systems
Driving and parking
Rear view camera
Important safety notes
The rearview camera is only an aid. It is not
a replacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering and
parking. When maneuveringorparking, make
sure that there are no persons, animals or
objects in the area in which you are
maneuvering.
Under the following circumstances, the rear
view camera will notfunction, or will function
in a limited manner:
R
if the trunk lid is open
R
in heavy rain, snow or fog
R
at night or in very dark places
R
if the camera is exposed to very bright light
R
if the area is lit by fluorescent light or LED
lighting (the display may flicker)
R
if there is a suddenchange in temperature,
e.g. when driving into a heated garage in
winter
R
if the camera lens is dirty or obstructed
R
if the rear of your vehicle is damaged. In
this event, have the camera position and
setting checked at a qualified specialist
workshop.
The rear view camera is located in the handle
strip of the trunk lid.
Rear view camera : is an optical parking and
maneuvering aid. It shows the area behind
your vehicle in the COMAND display.
:
Rear view camera
View through the camera
The area behind the vehicle is displayed as a
mirror image, as in the rear view mirror.
The rear view camera may show a distorted
view of obstacles, show them incorrectly or
not at all. The rear view camera does not show
objects in the following positions:
R
very close to the rear bumper
R
under the rear bumper
R
in the area immediately above the tailgate
handle
!
Objects not at ground level may appearto
be further away than they actually are, e.g.:
R
the bumper of a parked vehicle
R
the drawbar of a trailer
R
the ball coupling of a trailer tow hitch
R
the rear section of an HGV
R
a slanted post
Use the guidelines only for orientation.
Approach objects no further than the
bottom-most guideline.
Activating the rear view camera
X
Make sure that the SmartKey is in position
2 in the ignition lock.
X
Make sure that the rear view camera
function is selected in COMAND (see the
separate operating instructions for
COMAND).
X
Engage reverse gear.
The area behind the vehicle is shown in the
COMAND display.
ATTENTION ASSIST
Important safety notes
ATTENTION ASSIST is only an aid to the
driver. It might not always recognize fatigue
or increasing inattentiveness in time or fail to
recognize them at all. The system is not a
substitute for a well-rested and attentive
driver.
Driving systems
185
Driving and parking
Z
ATTENTION ASSIST helps you during long,
monotonous journeys, such as on highways.
It is active in the range between 50 mph
(80 km/h) and 112 mph (180 km/h).
If ATTENTION ASSIST detects typical
indicators of fatigue or increasing lapses in
concentration on the part of the driver, it
suggests you take a break.
ATTENTION ASSIST assesses your level of
fatigue or lapses in concentrationby taking
the following criteria into account:
R
your personal driving style, e.g. steering
characteristics
R
journey details, e.g. time of day and length
of journey
The functionality of ATTENTION ASSIST is
restricted and warnings may be delayed or
not occur at all:
R
if the road condition is poor, e.g. if the
surface is uneven or if there are potholes
R
if there is a strong side wind
R
if you have adopted a sporty driving style
with high cornering speeds or high rates of
acceleration
R
if you are predominantly driving slower
than 50 mph (80 km/h) or faster than
112 mph (180 km/h)
R
if you are currently using COMAND or
making a telephone call withit
R
if the time has been set incorrectly
R
in active driving situations, such as when
you change lanes or change your speed
Warning and display messages in the
multifunction display
X
Activate ATTENTION ASSIST using the on-
board computer (Y page 207).
Symbol : appears in the multifunction
display.
If ATTENTION ASSIST is active, you will be
warned no sooner than 20 minutes after your
journey has begun. You thenhear an
intermittent warning tonetwice and the
Attention Assist: Drowsiness
Detected message appears in the
multifunction display.
X
If necessary, take a break.
X
Press the a button to confirm the
message.
On long journeys, take regular breaks in good
time to allow yourself to restproperly. If you
do not take a break, you will be warned again
after 15 minutes at the earliest. The
precondition for this is that
ATTENTION ASSIST still detects typical
indicators of fatigue or increasing lapses in
concentration.
ATTENTION ASSIST is reset when you
continue yourjourney and starts assessing
your tiredness again if:
R
you switch off the engine.
R
you take off your seat belt and open the
driver's door, e.g. for a change of drivers or
to take a break.
Lane Tracking package
General notes
The Lane Tracking package consists of Blind
Spot Assist (Y page 186) and Lane Keeping
Assist (Y page 188).
Blind Spot Assist
General notes
Blind Spot Assist uses a radar sensor system
to monitor the areas on both sides of your
vehicle. It supports you from speeds of
approximately 20 mph (30 km/h). A warning
186
Driving systems
Driving and parking
display in the exterior mirrors draws your
attention to vehicles detected in the
monitored area. If you then switch on the
corresponding turn signal to change lanes,
you will also receive a visual and audible
collision warning.Blind Spot Assist uses
sensors in the rear bumper for monitoring
purposes.
For Blind Spot Assist to assist you when
driving, the radar sensor system must be:
R
activated(Y page 211)
R
operational
Important safety notes
Blind Spot Assist is only an aid. It may fail to
detect some vehicles and is no substitute for
attentive driving. Always ensure that there is
sufficientdistance to the side for other road
users and obstacles.
G
WARNING
Blind Spot Assist does not react to:
R
vehicles overtaken too closely on the side,
placing theminthe blind spot area
R
vehicles being overtaken at a speed
difference of more than 7.5 mph
(12 km/h)
R
vehicles which approach with a large speed
differential and overtake your vehicle
As a result, Blind Spot Assist may not give
warnings in such situations. There is a risk of
an accident.
Always observe the traffic conditions
carefully, and maintain a safe lateral distance.
i
USA only:
This device has been approved by the FCC
as a "VehicularRadar System". The radar
sensor is intended for use in an automotive
radar system only. Removing, tampering
with, or altering the device will void any
warranties, and is notpermitted by the
FCC. Do not tamper with, alter, or use in
any non-approved way.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
Monitoring range of the sensors
In particular, the detection of obstacles can
be impaired if:
R
dirt on the sensors or anything else
covering the sensors
R
poor visibility, e.g. due to fog, heavy rain,
snow or spray
R
narrow vehicles, e.g. motorcycles or
bicycles
R
the road has very wide lanes
R
the road has narrow lanes
R
you are not driving in the middle of the lane
R
there are barriers or similar lane borders
Vehicles in the monitoring range are then not
indicated.
Blind Spot Assist monitors the area up to
10 ft (3m) behind your vehicle and directly
nextto your vehicle, as shown in the diagram.
If the lanes are narrow, vehicles driving in the
lane beyond the lane next to your vehicle may
be indicated, especially if the vehicles are not
driving in the middle of their lane. This may
be the case if there are vehicles driving at the
inner edge of their lanes.
Driving systems
187
Driving and parking
Z
Due to the nature of the system:
R
warnings may be issued in error when
driving close to crash barriers or similar
solid lane borders.
R
the warning is canceled when driving for an
extended period next to long vehicles, such
as trucks.
The two radarsensors for Blind Spot Assist
are integrated into the sides of the rear
bumper. Make sure that the bumper is free of
dirt, ice or slush in the vicinity of the sensors.
The sensors must not be covered, for
example by cycle racks or overhanging loads.
Following a severe impact or in the event of
damage to the bumpers, have the function of
the sensors checked at a qualified specialist
workshop. Blind Spot Assist may otherwise
not work properly.
Indicator and warning display
Blind Spot Assist is not active at speeds below
approximately 20 mph (30 km/h).Vehicles in
the monitoring range are then not indicated.
:
Yellow indicator lamp/red warning lamp
When Blind Spot Assist is activated, indicator
lamp : in the exterior mirrors lights up
yellow at speeds of up to 20 mph (30km/h).
At speeds above 20 mph (30 km/h), the
indicator lamp goes out and Blind Spot Assist
is operational.
If a vehicle is detected withinthe monitoring
range of Blind Spot Assist at speeds above
20 mph (30 km/h), warning lamp : on the
corresponding side lights up red. This warning
is always emitted when a vehicle enters the
blind spot monitoring range from behind or
from the side. When you overtake a vehicle,
the warning only occurs if the difference in
speed is less than 7mph (12 km/h).
The yellow indicator lamp goes out if reverse
gear is engaged. In this event, Blind Spot
Assist is no longer active.
The brightness of the indicator/warning
lamps is adjusted automatically according to
the ambient light.
Collision warning
If a vehicle is detected in the monitoring range
of Blind Spot Assist and you switch on the
corresponding turn signal, a double warning
tone sounds. Red warning lamp : flashes. If
the turn signal remains on, vehicles detected
are indicated by the flashing of red warning
lamp :.There are no further warning tones.
Switching on Blind Spot Assist
X
Make sure that the radar sensor system
(Y page 211) and Blind Spot Assist
(Y page 208) are activated in the on-board
computer.
X
Turn the SmartKey to position 2 in the
ignition lock.
Warning lamps : in the exterior mirrors
light up red for approximately
1.5 seconds and then turn yellow.
Lane Keeping Assist
Important safety notes
If you fail to adapt your driving style, Lane
Keeping Assist can neither reduce the risk of
an accident nor override the laws of physics.
Lane Keeping Assist cannot take into account
the road, traffic and weather conditions. Lane
Keeping Assist is merely an aid. You are
responsible for the distance to the vehicle in
front, for vehicle speed, for braking in good
time and for staying in your lane.
G
WARNING
Lane Keeping Assist may not always clearly
recognize lane markings.
188
Driving systems
Driving and parking
In this case, Lane Keeping Assist may:
R
give an unnecessary warning
R
not give a warning
There is a risk of an accident.
Always pay particular attention to the traffic
situation and stay in lane, in particular if
warned by Lane Keeping Assist.
G
WARNING
The Lane Keeping Assist warning does not
return the vehicle to the original lane. There
is a risk of an accident.
You should always steer, brake or accelerate
yourself, in particular if warned by Lane
Keeping Assist.
The Lane Keeping Assist does not keep the
vehicle in the lane.
The system may be impaired or may not
function if:
R
there is poor visibility, e.g. due to
insufficient illuminationofthe road, or due
to snow, rain, fog or spray
R
there is glare, e.g. from oncoming traffic,
the sun or reflections (e.g. when the road
surface is wet)
R
the windshield is dirty, fogged up, damaged
or covered, for instance by a sticker, in the
vicinity of the camera
R
there are no, several or unclear lane
markings for a lane, e.g. in areas with road
construction work
R
the lane markings are worn away, dark or
covered up, e.g. by dirt or snow
R
the distance to the vehicle in front is too
small and the lane markings thus cannot be
detected
R
the lane markings change quickly, e.g.
lanes branch off, cross one another or
merge
R
the road is narrow and winding
R
there are strong shadows cast on the lane
General notes
Lane Keeping Assist monitors the area in
front of your vehicle with camera :, which is
mounted at the top of the windshield. Lane
Keeping Assist detects lane markings on the
road and warns you before you leave your
lane unintentionally.
:
Active Lane Keeping Assist camera
If you select
km on the on-board computer in
the
Display Unit Speed-/Odometer
function (Y page 209), Lane Keeping Assist
is active starting at aspeed of 60 km/h. If the
miles
display unit is selected, the assistance
range begins at 40 mph.
A warning may be given if a front wheel
passes over a lane marking. It will warn you
by means of intermittent vibration in the
steering wheel for up to 1.5 seconds.
Switching on Lane Keeping Assist
X
Switch on Active Lane Keeping Assist using
the on-board computer; to do so, select
Standard or Adaptive(Y page 208).
Symbol : appears in the multifunction
display.
If you drive at speeds above 40 mph
(60 km/h) and lane markings are detected,
Driving systems
189
Driving and parking
Z
symbol : is shown in green. Lane Keeping
Assist is ready for use.
Standard
If
Standard
is selected, no warning vibration
occurs if:
R
you switch on the turn signals. In this event,
the warnings are suppressed for a certain
period of time.
R
a driving safety system intervenes, such as
ABS, BAS or ESP
®
.
Adaptive
If
Adaptive is selected, no warning vibration
occurs if:
R
you switch on the turn signals. In this event,
the warnings are suppressed for a certain
period of time.
R
a driving safety system intervenes, e.g.
ABS, BAS or ESP
®
.
R
you accelerate hard, e.g. kickdown.
R
you brake hard.
R
you steer actively, e.g. swerve to avoid an
obstacle or change lanes quickly.
R
you cut the corner on a sharp bend.
In order that you are warned only when
necessary and in good time if you cross the
lane marking, the system recognizes certain
conditions and warns you accordingly.
The warning vibration occurs earlierif:
R
you approach the outer lane marking on a
bend.
R
the road has very wide lanes, e.g. a
highway.
R
the system recognizes solidlane markings.
The warning vibrationoccurs later if:
R
the road has narrow lanes.
R
you cut the corner on a bend.
Active Driving Assistance package
General notes
The Active Driving Assistance package
consists of DISTRONIC PLUS (Y page 167),
Active Blind Spot Assist (Y page 190) and
Active Lane Keeping Assist (Y page 193).
Active Blind SpotAssist
General notes
Active Blind Spot Assist uses a radar sensor
system to monitor the side areas of your
vehicle which are behind the driver. Awarning
display in the exterior mirrors draws your
attentionto vehicles detected in the
monitored area. If you then switch on the
corresponding turn signal to change lane, you
will also receive an optical and audible
warning. If a risk of lateral collision is
detected, corrective braking may help you
avoid a collision. To support the course-
correcting brake application, Active Blind
Spot Assist uses the forward-facing radar
sensor system. The space available in the
direction of travel as well as to the side of the
vehicle is evaluated before a course-
correcting braking application is performed.
Active Blind Spot Assist supports you from a
speed of approximately 20 mph (30 km/h).
For Active Blind Spot Assist to assist you
when driving, the radar sensor system must
be:
R
activated(Y page 211)
R
operational
Important safety notes
Active Blind Spot Assist is only an aid. It does
not detect all traffic situations and road users
and is no substitute for attentive driving.
Always ensure that there is sufficient
distance to the side for other road users and
obstacles.
190
Driving systems
Driving and parking
G
WARNING
Active Blind Spot Assist does not react to:
R
vehicles overtaken too closely on the side,
placing them in the blind spot area
R
vehicles being overtaken at a speed
difference of more than 7.5 mph
( 12 km/h)
R
vehicles which approach with a large speed
differential and overtake yourvehicle
As a result, Active Blind Spot Assist may
neither give warnings nor intervene in such
situations. There is a risk of an accident.
Always observe the traffic conditions
carefully, and maintain a safe lateral distance.
i
USA only:
This device has been approved by the FCC
as a "Vehicular Radar System". The radar
sensor is intended for use in an automotive
radar system only. Removing, tampering
with, or altering the device will void any
warranties, and is not permitted by the
FCC. Do not tamper with, alter, or use in
any non-approved way.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
i
Canada only: This device complies with
RSS-210 of Industry Canada. Operation is
subject to the following two conditions:
1. This device may not cause harmful
interference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation of the device.
Removal, tampering, or altering of the
device will void any warranties, and is not
permitted. Do not tamper with, alter, or use
in any non-approved way.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
Monitoring range of the sensors
G
WARNING
Active Blind Spot Assist does not detect all
traffic situations and road users. There is a
risk of an accident.
Always make sure that there is sufficient
distance on the side for other traffic or
obstacles.
In particular, the detection of obstacles can
be impaired if:
R
dirt on the sensors or anything else
covering the sensors
R
poor visibility, e.g. due to rain, snow or
spray
Vehicles in the monitoring range are then not
indicated.
Active Blind Spot Assist may not detect
narrow vehicles, such as motorcycles or
bicycles, or may only detectthem too late.
Active Blind Spot Assist monitors the area up
to 10 ft (3 m) behind your vehicle and directly
next to your vehicle, as shown in the diagram.
For this purpose, Active Blind Spot Assist
uses radar sensors in the rear bumper.
If the lanes are narrow, vehicles driving in the
lane beyond the lane next to your vehicle may
be indicated, especially if the vehicles are not
driving in the middle of their lane. This may
Driving systems
191
Driving and parking
Z
be the case if there are vehicles driving at the
inner edge of their lanes.
Due to the nature of the system:
R
warnings may be issued in error when
driving close to crash barriers or similar
solid lane borders.
R
the warning is canceled when driving for an
extended period nextto long vehicles, such
as trucks.
Two Active Blind Spot Assist radar sensors
are integrated into the front and rear bumpers
respectively. An additional radar sensor is
located behind the cover in the radiator grill.
Make sure that the sensors and areas around
them are free of dirt, ice or slush. The rear
sensors must not be covered, for example by
cycle racks or overhanging cargo. Following
a severe impact or in the event of damage to
the bumpers, have the function of the sensors
checked at a qualified specialist workshop.
Blind Spot Assist may otherwise not work
properly.
Indicator and warning display
Active Blind Spot Assist is not active at
speeds below approximately 20 mph
(30 km/h). Vehicles in the monitoring range
are then not indicated.
:
Yellow indicator lamp/red warning lamp
When Active Blind Spot Assist is activated,
indicator lamp : in the exterior mirrors lights
up yellow at speeds of up to 20 mph
(30 km/h). At speeds above 20 mph
(30 km/h), the indicator lamp goes out and
Active Blind Spot Assist is operational.
If a vehicle is detected within the monitoring
range of Active Blind Spot Assist at speeds
above 20 mph (30 km/h), warning lamp :
on the corresponding side lights up red. This
warning is always emitted when a vehicle
enters the blind spot monitoring range from
behind or from the side. When you overtake
a vehicle, the warning only occurs if the
difference in speed is less than 7mph
(12 km/h).
The yellow indicator lamp goes out if reverse
gear is engaged. In this event, Active Blind
Spot Assist is no longer active.
The brightness of the indicator/warning
lamps is adjusted automatically according to
the ambient light.
Visual and acoustic collision warning
When you switch on the turn signals to
change lanes and a vehicle is detected in the
side monitoring range, you receive a visual
and acoustic collision warning.You then hear
a double warning tone and red warning
lamp : flashes. If the turn signal remains on,
detected vehicles are indicated by the
flashing of red warning lamp :.There are no
further warning tones.
Course-correcting brake application
G
WARNING
Acourse-correcting brake application cannot
always prevent a collision. There is a risk of
an accident.
Always steer, brake or accelerate yourself,
especially if Active Blind Spot Assist warns
you or makes a course-correcting brake
application. Always maintain a safe distance
at the sides.
In very rare cases, the system may make an
inappropriate brake application. An
inappropriate brake application may be
interrupted at any time if you steer slightly in
the opposite direction or accelerate.
If Active Blind Spot Assist detects a risk of a
lateral collision in the monitoring range, a
course-correcting brake application is carried
192
Driving systems
Driving and parking
out. This is meant to assist you in avoiding a
collision.
The course-correcting brake application is
available in the speed range between
20 mph (30 km/h) and120 mph (200 km/h).
If a course-correcting brake application
occurs, red warning lamp : flashes in the
exteriormirrorand the following is shown in
the multifunctiondisplay, for example:
Either a very slight course-correcting brake
application, or none at all, may occur if:
R
there are vehicles or obstacles, e.g. crash
barriers, located on both sides of your
vehicle.
R
a vehicle approaches you too closely at the
side.
R
you have adopted a sporty driving style with
high cornering speeds.
R
you clearly brake or accelerate.
R
a driving safety system intervenes, e.g.
ESP
®
or PRE-SAFE
®
Brake.
R
ESP
®
is switched off.
R
a loss of tire pressure or a defective tire is
detected.
Switching on Active Blind Spot Assist
X
Make sure that the radar sensor system
(Y page 211) and Active Blind Spot Assist
(Y page 208)are activated in the on-board
computer.
X
Turn the SmartKey to position 2 in the
ignitionlock.
Warning lamps : in the exterior mirrors
light up red for approximately
1.5 seconds and then turn yellow.
Active Lane Keeping Assist
General notes
Active Lane Keeping Assist monitors the area
in front of your vehicle by means of
camera : mounted at the top of the
windshield. Active Lane Keeping Assist
detects lane markings on the road and warns
you before you leave your lane
unintentionally. If you do not react to the
warning, a lane-correcting application of the
brakes can bring the vehicle back into the
original lane.
:
Active Lane Keeping Assist camera
If you select
km in the Display Unit
Speed-/Odometer: function on the on-board
computer(Y page 209), Active Lane Keeping
Assist is activated starting at a speed of
60 km/h. If the
miles display unit is selected,
the assistance range begins at 40 mph.
Important safety notes
If you fail to adapt your driving style, Active
Lane Keeping Assist can neither reduce the
risk of accident nor override the laws of
physics. Lane Keeping Assist cannot take into
account the road, traffic and weather
conditions. Lane Keeping Assist is merely an
aid. You are responsible for the distance to
the vehicle in front, for vehicle speed, for
braking in good time and for staying in your
lane.
Active Lane Keeping Assist cannot
continuously keep your vehicle in its lane.
Driving systems
193
Driving and parking
Z
G
WARNING
Active Lane Keeping Assist cannot always
clearly detect lane markings.
In such cases, Active Lane Keeping Assist
can:
R
give an unnecessary warning and then
make a course-correcting brake application
to the vehicle
R
not give a warning or intervene
There is a risk of an accident.
Always pay particular attention to the traffic
situation and keep withinthe lane, especially
if Active Lane Keeping Assist alerts you.
Terminate the intervention in a non-critical
driving situation.
The system may be impaired or may not
function if:
R
there is poor visibility, e.g. due to
insufficient illumination of the road, or due
to snow, rain, fog or spray
R
there is glare, e.g. from oncoming traffic,
the sun or reflections (e.g. when the road
surface is wet)
R
the windshield is dirty, fogged up, damaged
or covered, for instance by a sticker, in the
vicinity of the camera
R
there are no, several or unclear lane
markings for a lane, e.g. in areas with road
construction work
R
the lane markings are worn away, dark or
covered up, e.g. by dirt or snow
R
the distance to the vehicle in front is too
small and the lane markings thus cannot be
detected
R
the lane markings change quickly, e.g.
lanes branch off, cross one another or
merge
R
the road is narrow and winding
R
there are highly variable shade conditions
on the roadway
R
no vehicle is detected in the adjacent lane
and there are broken lane markings
Warning vibration in the steering wheel
A warning may be given if a front wheel
passes over a lane marking. It will warn you
by means of intermittent vibration in the
steering wheel for up to 1.5 seconds.
In order that you are warned only when
necessary and in good time if you cross the
lane marking, the system recognizes certain
conditions and warns you accordingly.
The warning vibration occurs earlier if:
R
you approach the outer lane marking on a
bend.
R
the road has very wide lanes, e.g. a
highway.
R
the system recognizes solid lane markings.
The warning vibration occurs later if:
R
the road has narrow lanes.
R
you cut the corner on a bend.
Lane-correcting brake application
G
WARNING
A lane-correcting brake application cannot
always bring the vehicle back into the original
lane. There is a risk of an accident.
Always steer, brake or accelerate yourself,
especially if Active Lane Keeping Assist warns
you or makes a lane-correcting brake
application.
G
WARNING
Active Lane Keeping Assist does not detect
traffic conditions or road users. In very rare
cases, the system may make an inappropriate
brake application, e.g. after intentionally
driving over a solid lane marking. There is a
risk of an accident.
An inappropriate brake application may be
interrupted at any time if you steer slightly in
the opposite direction. Always make sure that
there is sufficient distance on the side for
other traffic or obstacles.
If you leave your lane, under certain
circumstances the vehicle will brake briefly
194
Driving systems
Driving and parking
on one side. This is meant to assist you in
bringing the vehicle back to the original lane.
This function is available in the range between
40 mph and 120 mph (60 km/h and
200 km/h).
A lane-correcting brake application can only
be made after driving over a solid,
recognizable lane marking. Before this, a
warning must be given by means of
intermittent vibration in the steering wheel.
In addition, a lane with lane markings on both
sides must be recognized. The brake
application also slightly reduces vehicle
speed.
If a lane-correcting brake application occurs,
the following, for example, appears in the
multifunction display:
i
A further lane-correcting brake
application can only occur after your
vehicle has returned to the original lane.
No lane-correcting brake application occurs
if:
R
you clearly and actively steer, brake or
accelerate.
R
you cut the corner on a sharp bend.
R
you switch on the turn signals.
R
a driving safety system intervenes, e.g.
ESP
®
, PRE-SAFE
®
Brake or Active Blind
Spot Assist.
R
you have adopted a sporty driving style with
high cornering speeds or high rates of
acceleration.
R
ESP
®
is switched off.
R
the transmission is not in position D.
R
a loss of tire pressure or a defective tire has
been detected and displayed.
Active Lane Keeping Assist does not detect
traffic situations or road users. An
inappropriate brake application may be
interrupted at any time if you:
R
steer slightly in the opposite direction
R
use a turn signal.
R
clearly brake or accelerate
Alane-correcting brake applicationis
interrupted automatically if:
R
a driving safety system intervenes, e.g.
ESP
®
, PRE-SAFE
®
Brake or Active Blind
Spot Assist.
R
lane markings can no longer be recognized.
Switching on Active Lane Keeping Assist
X
Switch on Active Lane Keeping Assist using
the on-board computer; to do so, select
Standard or Adaptive(Y page 208).
Symbol : appears in the multifunction
display.
If you drive at speeds above 40 mph
(60 km/h) and lane markings are detected,
symbol : is shown in green. Active Lane
Keeping Assist is ready for use.
If Standard
is selected, no warning
vibration occurs if:
R
you have switched on the turnsignals.In
this event, the warnings are suppressed
for a certain period of time.
R
a driving safety systemintervenes, such
as ABS, BAS or ESP
®
.
If
Adaptive is selected, no warning
vibration occurs if:
Driving systems
195
Driving and parking
Z
R
you have switched on the turnsignals.In
this event, the warnings are suppressed
for a certain period of time.
R
a driving safety systemintervenes, e.g.
ABS, BAS or ESP
®
.
R
you accelerate hard, e.g.kickdown.
R
you brake hard.
R
you steer actively, e.g. swerve to avoid
an obstacle or change lanes quickly.
R
you cut the corner on a sharp bend.
196
Driving systems
Driving and parking

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