2013-2018 Mercedes CLA 4 Door On-board computer and displays -> Display messages User Manual
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On-board computer and displays -> Display messages for Your Mercedes CLA 4 Door First Generation (2013-2018)

Display messages
Introduction
General notes
Display messages appear in the multifunction display.
Display messages with graphic symbols are simplified in the Owner's Manual and may differ from
the 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 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, these
display messages are deleted as well.
When you stop and park the vehicle, please observe the notes on:
R
HOLD function (Y page 172)
R
Parking (Y page 155)
Hiding display messages
X
Press the a or % button on the steering wheel.
The multifunction display hides the display message.
The multifunction display shows high-priority display messages in red. Some high-priority display
messages cannot be hidden.
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 in the message memory. You can call up
the display messages:
X
Press the = or ; button on the steering wheel to select the
ServiceService menu.
If there are display messages, the multifunction display shows
2 messages2 messages, for example.
X
Press the 9 or : button to select the entry, e.g.
2 messages2 messages.
X
Press a to confirm.
X
Press the 9 or : button to scroll through the display messages.
216
Display messages
On-board computer and displays
Safety systems
Display messages
Possible causes/consequences and MM Solutions
!÷
currently unavaila‐currently unavaila‐
bleble SeeSee Owner'sOwner's Man‐Man‐
ualual
ABS (Anti-lock Braking System), BAS (Brake Assist System), ESP
®
(Electronic Stability Program), ESP
®
trailer stabilisation, the HOLD
function, hill start assist and PRE-SAFE
®
are temporarily unavailable.
Adaptive brake lights and Active Brake Assist may have also failed.
In addition, the !, ÷ and å warning lamps may 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.
The steerability and braking characteristics may be severely affected.
The braking distance may increase in an emergency braking situation.
If ESP
®
is not operational, ESP
®
is unable to stabilise the vehicle.
Increased risk of skidding and/or accident!
X
Carefully drive on a suitable stretch of road, making slight steering
movements, at a speed above 20 km/h.
If the display message disappears, the functions mentioned above
are available again.
If the multifunction display still shows the display message:
X
Drive on carefully.
X
Consult a qualified specialist workshop immediately.
!÷
inoperativeinoperative SeeSee Own‐Own‐
er's Manualer's Manual
ABS, BAS, ESP
®
, ESP
®
trailer stabilisation, the HOLD function, hill
start assist and PRE-SAFE
®
are unavailable due to a malfunction.
Adaptive brake lights and Active Brake Assist may have also failed.
The !, ÷, å and J warning lamps may also 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. The wheels could therefore lock if you brake
hard, for example.
The steerability and braking characteristics may be severely affected.
The braking distance may increase in an emergency braking situation.
If ESP
®
is not operational, ESP
®
is unable to stabilise the vehicle.
Increased risk of skidding and/or accident!
X
Drive on carefully.
X
Consult a qualified specialist workshop immediately.
Display messages
217
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
÷
currently unavaila‐currently unavaila‐
bleble SeeSee Owner'sOwner's Man‐Man‐
ualual
ESP
®
, ESP
®
trailer stabilisation, BAS, the HOLD function, hill start
assist and PRE-SAFE
®
are temporarily unavailable.
Adaptive brake lights and Active Brake Assist may have also failed.
In addition, the ÷ and å warning lamps may light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
The self-diagnosis function, for example, may not be complete.
G
WARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance may thus increase in an emergency braking sit-
uation.
If ESP
®
is not operational, ESP
®
is unable to stabilise the vehicle.
Increased risk of skidding and/or accident!
X
Carefully drive on a suitable stretch of road, making gentle steering
movements at speeds of above 20 km/h.
If the display message disappears, the functions mentioned above
are available again.
If the multifunction display still shows the display message:
X
Drive on carefully.
X
Consult a qualified specialist workshop immediately.
÷
inoperativeinoperative SeeSee Own‐Own‐
er's Manualer's Manual
ESP
®
, ESP
®
trailer stabilisation, BAS, the HOLD function, hill start
assist and PRE-SAFE
®
are unavailable due to a malfunction.
Adaptive brake lights and Active Brake Assist may have also failed.
In addition, the ÷ and å warning lamps may 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.
The braking distance may thus increase in an emergency braking sit-
uation.
If ESP
®
is not operational, ESP
®
is unable to stabilise the vehicle.
Increased risk of skidding and/or accident!
X
Drive on carefully.
X
Consult a qualified specialist workshop immediately.
218
Display messages
On-board computer and displays
Display messages
Possible causes/consequences and MM Solutions
T!
÷
inoperativeinoperative SeeSee Own‐Own‐
er's Manualer's Manual
EBD (electronic brake force distribution), ABS, BAS, ESP
®
, ESP
®
trailer
stabilisation, the HOLD function, hill start assist and PRE-SAFE
®
are
unavailable due to a malfunction.
Adaptive brake lights and Active Brake Assist may have also failed.
A warning tone sounds.
In addition, the ÷, å and ! warning lamps may light up in
the instrument cluster.
G
WARNING
The brake system continues to function normally, but without the
functions listed above. The front and rear wheels could therefore lock
if you brake hard, for example.
The steerability and braking characteristics may be severely affected.
The braking distance may increase in an emergency braking situation.
If ESP
®
is not operational, ESP
®
is unable to stabilise the vehicle.
Increased risk of skidding and/or accident!
X
Drive on carefully.
X
Consult a qualified specialist workshop immediately.
!
Turn on the igni‐Turn on the igni‐
tiontion toto releaserelease thethe
parking brakeparking brake
The red ! indicator lamp lights up.
You attempted to release the electric parking brake while the ignition
was switched off.
X
Key: turn the key to position 1 in the ignition lock.
X
KEYLESS-GO: switch on the ignition.
!
Release parkingRelease parking
brakebrake
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 157).
You are driving with the electric parking brake applied.
X
Release the electric parking brake manually.
The red ! indicator lamp flashes and a warning tone sounds.
You are making an emergency stop using the electric parking brake
(Y page 157).
!
Parking brake SeeParking brake See
Owner's ManualOwner'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 lever for at least ten seconds.
X
Vehicles with manual transmission: engage first gear.
X
Vehicles with automatic transmission: shift the transmission to
position P.
X
Consult a qualified specialist workshop.
Display messages
219
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
The yellow ! warning lamp and the red ! indicator lamp are lit.
The electric parking brake is malfunctioning.
To release:
X
Turn the ignition off and then back on.
X
Release the electric parking brake manually.
or
X
Vehicles with manual transmission (automatic emergency
release):insert the seat belt in the belt buckle and accelerate
slightly more when pulling away.
X
Vehicles with automatic transmission: release the electric park-
ing brake automatically (Y page 157).
If the electric parking brake still cannot be released:
X
Do not drive on.
X
Consult a qualified specialist workshop.
The red ! indicator lamp flashes and the yellow ! warning lamp
is lit.
The electric parking brake is malfunctioning.
To release:
X
Turn the ignition off and then back on.
X
Release the electric parking brake manually.
To apply:
X
Turn the ignition off and then back on.
X
Apply 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 319).
X
Vehicles with manual transmission: engage first gear.
X
Vehicles with automatic transmission: shift the transmission to
position P.
X
Turn the front wheels towards the kerb.
X
Consult a qualified specialist workshop.
220
Display messages
On-board computer and displays
Display messages
Possible causes/consequences and MM Solutions
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
Turn the ignition off and then back on.
X
Apply the electric parking brake.
If you cannot apply the electric parking brake:
X
Vehicles with manual transmission: engage first gear.
X
Vehicles with automatic transmission: shift the transmission to
position P.
X
Consult a qualified specialist workshop.
If it is not possible to release the electric parking brake:
X
Vehicles with manual transmission (automatic emergency
release):insert the seat belt in the belt buckle and accelerate
slightly more when pulling away.
X
Vehicles with automatic transmission: release the electric park-
ing brake automatically (Y page 157).
If the electric parking brake still cannot be released:
X
Consult a qualified specialist workshop.
The yellow ! warning lamp lights up. If you manually apply or
release the electric parking brake, the red ! indicator lamp
flashes.
The electric parking brake is malfunctioning. The electric parking
brake cannot be applied manually.
X
Vehicles with manual transmission: switch off the ignition.
The electric parking brake is applied automatically.
or
X
Insert the seat belt in the belt buckle and accelerate slightly more
when pulling away (automatic emergency release).
X
Vehicles with automatic transmission: shift the transmission to
position P, as the electric parking brake is not applied automati-
cally.
X
Consult a qualified specialist workshop.
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.
Display messages
221
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
!
Parking brake inop‐Parking brake inop‐
erativeerative
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
Rectify the cause of the overvoltage or undervoltage, e.g. by charg-
ing the battery or restarting the engine.
X
Apply or release the electric parking brake.
If the electric parking brake still cannot be applied or released:
X
Turn the ignition off and then back on.
X
Apply or release the electric parking brake.
If the electric parking brake still cannot be released:
X
Consult a qualified specialist workshop.
If the electric parking brake still cannot be applied:
X
Consult a qualified specialist workshop.
The red ! indicator lamp flashes and the yellow ! warning lamp
is lit.
The electric parking brake cannot be applied manually.
X
Vehicles with manual transmission: engage first gear.
X
Vehicles with automatic transmission: shift the transmission to
position P.
X
Consult a qualified specialist workshop.
J
Brake immediatelyBrake immediately
Vehicles with manual transmission: a malfunction has occurred while
the HOLD function was activated.
A tone may also sound at regular intervals. If you attempt to lock the
vehicle, the tone becomes louder.
You cannot start the engine.
X
Paying attention to the traffic situation, immediately depress the
brake pedal firmly and hold until the display message disappears.
X
Secure the vehicle against rolling away (Y page 155).
You can restart the engine.
222
Display messages
On-board computer and displays
Display messages
Possible causes/consequences and MM Solutions
J
Check brake fluidCheck brake fluid
levellevel
There is insufficient brake fluid in the brake fluid reservoir.
In addition, the red J warning lamp lights up on the instrument
cluster and a warning tone sounds.
G
WARNING
Braking efficiency may be impaired.
There is a risk of an accident.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving.
X
Secure the vehicle against rolling away (Y page 155).
X
Consult a qualified specialist workshop.
X
Do not top up the brake fluid. This does not correct the fault.
#
CheckCheck brakebrake padpad wearwear
The brake pads/linings have reached their wear limit.
X
Consult a qualified specialist workshop.
G
InoperativeInoperative
One or more main features of the Mercedes-Benz Contact system are
malfunctioning.
X
Consult a qualified specialist workshop.
ActiveActive BrakeBrake AssistAssist
FunctionsFunctions currentlycurrently
limitedlimited SeeSee Owner'sOwner's
ManualManual
Active Brake Assist is temporarily inoperative.
Possible causes:
R
The radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio stations or
other sources of electromagnetic radiation.
R
The system is outside the operating temperature range.
R
The on-board voltage is too low.
Once the causes listed above no longer apply, the display message
goes out.
Active Brake Assist is operational again.
If the display message does not disappear:
X
Stop the vehicle, paying attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 155).
X
Restart the engine.
Active BrakeActive Brake
Assist:Assist: SystemSystem inop‐inop‐
erativeerative
Active Brake Assist is unavailable due to a malfunction. The situation-
dependent braking assistance function may also have failed.
X
Consult a qualified specialist workshop immediately.
PRE-SAFE inopera‐PRE-SAFE inopera‐
tive See Owner'stive See Owner's
ManualManual
Important PRE-SAFE
®
functions have failed. All other occupant safety
systems, e.g. airbags, remain available.
X
Consult a qualified specialist workshop immediately.
Display messages
223
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
RadarRadar sensorssensors dirtydirty
See Owner's ManualSee Owner's Manual
The radar sensor system is malfunctioning.
Possible causes:
R
Dirt on sensors
R
Heavy rain or snow
R
Driving on inter-urban roads without traffic or infrastructure, e.g. in
desert-like areas
At least one driving system or driving safety system is malfunctioning
or is temporarily unavailable:
R
Active Brake Assist
R
Distance Pilot DISTRONIC
A warning tone also sounds.
Once the cause of the problem is no longer present, the driving and
driving safety systems will be available again. The display message
disappears.
If the display message does not disappear:
X
Stop the vehicle, paying attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 155).
X
Switch off the engine.
X
Clean all sensors (Y page 289).
X
Restart the engine.
The display message disappears.
ü
If this symbol appears in the multifunction display, a seat belt tongue
has been inserted into a rear seat belt buckle.
Further information on the status indicator for the rear seat belts
(Y page 44).
ý
If this symbol appears in the multifunction display, a seat belt tongue
has not been inserted in a rear seat belt buckle.
G
WARNING
A seat belt which is not worn correctly, or which has not been engaged
in the seat belt buckle correctly, cannot provide the intended level of
protection.
This poses an increased risk of injury.
X
If necessary, ask the occupants in the rear to fasten their seat belts
(Y page 43).
Further information on the status indicator for the rear seat belts
(Y page 44).
224
Display messages
On-board computer and displays
Display messages
Possible causes/consequences and MM Solutions
6
Restraint sys. mal‐Restraint sys. mal‐
function Consultfunction Consult
workshopworkshop
The restraint system is malfunctioning. The 6 warning lamp also
lights up on the instrument cluster.
G
WARNING
The airbags or belt tensioners may either be triggered unintentionally
or, in the event of an accident, may not be triggered.
This poses an increased risk of injury.
X
Consult a qualified specialist workshop immediately.
Further information about the restraint system (Y page 39).
6
Front left malfunc‐Front left malfunc‐
tion Consult work‐tion Consult work‐
shopshop or Front rightFront right
malfunction
malfunction ConsultConsult
workshopworkshop
The front left or right restraint system is malfunctioning. The 6
warning lamp also lights up on the instrument cluster.
G
WARNING
The airbags or belt tensioners may either be triggered unintentionally
or, in the event of an accident, may not be triggered.
This poses an increased risk of injury.
X
Consult a qualified specialist workshop immediately.
6
Rear left malfunc‐Rear left malfunc‐
tion Consult work‐tion Consult work‐
shopshop or Rear rightRear right
malfunction
malfunction ConsultConsult
workshopworkshop
The rear left or right restraint system is malfunctioning. The 6
warning lamp also lights up on the instrument cluster.
G
WARNING
The airbags or belt tensioners may either be triggered unintentionally
or, in the event of an accident, may not be triggered.
This poses an increased risk of injury.
X
Consult a qualified specialist workshop immediately.
6
Left windowbag mal‐Left windowbag mal‐
function Consultfunction Consult
workshopworkshop or RightRight
windowbag malfunc‐
windowbag malfunc‐
tion Consult work‐tion Consult work‐
shopshop
The left-hand or right-hand windowbag is malfunctioning. The 6
warning lamp also lights up in the instrument cluster.
G
WARNING
The left-hand or right-hand windowbag may either be triggered unin-
tentionally or, in the event of an accident, not triggered at all.
This poses an increased risk of injury.
X
Consult a qualified specialist workshop immediately.
Display messages
225
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
Front-passengerFront-passenger
airbagairbag disableddisabled SeeSee
Owner's ManualOwner's Manual
The front-passenger front airbag is disabled during the journey
although:
R
an adult
or
R
a person of the corresponding stature is on the front-passenger seat
If additional forces are applied to the seat, the weight the system
detects may be too low.
G
WARNING
The front-passenger front airbag does not deploy during an accident.
This poses an increased risk of injury.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 155).
X
Switch the ignition off.
X
Have the occupant on the front-passenger seat step out of the
vehicle.
X
Make sure that the seat is unoccupied, close the front-passenger
door and switch on the ignition.
X
Observe the PASSENGER AIR BAG indicator lamps in the centre
console and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
R
A self-diagnosis is carried out. The PASSENGER AIR BAG OFF and
PASSENGER AIR BAG ON indicator lamps light up simultaneously
for approximately six seconds
R
The PASSENGER AIR BAG OFF indicator lamp must then light up
and remain lit after the self-diagnosis. If the indicator lamp is on,
the automatic front-passenger front airbag deactivation system
has disabled the front-passenger front airbag (Y page 47)
R
The
Front-passenger airbag enabled See Owner's Man‐Front-passenger airbag enabled See Owner's Man‐
ual
ual or Front-passenger airbag disabled See Owner'sFront-passenger airbag disabled See Owner's
Manual
Manual display messages must not be shown in the multifunction
display
X
Wait for a period of at least 60 seconds until the necessary system
checks have been completed.
X
Make sure that the display messages do not appear on the multi-
function display.
If these conditions are met, the front-passenger seat can be occupied
again. Whether the PASSENGER AIR BAG OFF or ON indicator lamp
remains lit or goes out depends on how the automatic front-passenger
front airbag deactivation system classifies the occupant.
If the conditions are not met, the system is not operating correctly.
X
Consult a qualified specialist workshop immediately.
Further information on the automatic front-passenger front airbag
deactivation feature (Y page 47).
226
Display messages
On-board computer and displays
Display messages
Possible causes/consequences and MM Solutions
Front-passengerFront-passenger
airbag enabled Seeairbag enabled See
Owner's ManualOwner's Manual
The front-passenger front airbag is enabled during the journey
although:
R
a child, a small adult or an object weighing less than the system
weight threshold is located on the front-passenger seat
or
R
the front-passenger seat is not occupied
The system may detect objects or forces that are placing additional
weight on the seat.
G
WARNING
The airbag may deploy unintentionally.
This poses an increased risk of injury.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 155).
X
Switch the ignition off.
X
Open the front-passenger door.
X
Remove the child and child seat from the front-passenger seat.
X
Make sure that no objects are present that are applying additional
weight to the seat.
The system might otherwise detect the additional weight and inter-
pret the seat occupant's weight as greater than it actually is.
X
Make sure that the seat is unoccupied, close the front-passenger
door and switch on the ignition.
X
Observe the PASSENGER AIR BAG indicator lamps in the centre
console and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
R
A self-diagnosis is carried out. The PASSENGER AIR BAG OFF and
PASSENGER AIR BAG ON indicator lamps light up simultaneously
for approximately six seconds
R
The PASSENGER AIR BAG OFF indicator lamp must then light up
and remain lit after the self-diagnosis. If the indicator lamp is on,
the automatic front-passenger front airbag deactivation system
has disabled the front-passenger front airbag (Y page 47)
R
The
Front-passenger airbag enabled See Owner's Man‐Front-passenger airbag enabled See Owner's Man‐
ual
ual or Front-passenger airbag disabled See Owner'sFront-passenger airbag disabled See Owner's
Manual
Manual display messages must not be shown in the multifunction
display
X
Wait for a period of at least 60 seconds until the necessary system
checks have been completed.
X
Make sure that the display messages do not appear on the multi-
function display.
If these conditions are met, the front-passenger seat can be occupied
again. Whether the PASSENGER AIR BAG OFF or ON indicator lamp
remains lit or goes out depends on how the automatic front-passenger
front airbag deactivation system classifies the occupant.
If the conditions are not met, the system is not operating correctly.
Display messages
227
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
X
Consult a qualified specialist workshop immediately.
Further information on the automatic front-passenger front airbag
deactivation feature (Y page 47).
Lights
i
Vehicles with LED light bulbs in the light clusters:
The display message for the corresponding lamp only appears when all the LEDs in the lamp have
failed.
Display messages
Possible causes/consequences and MM Solutions
b
Left corneringLeft cornering
lightlight or Right cor‐Right cor‐
nering light
nering light
The left or right-hand cornering light is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 111).
or
X
Consult a qualified specialist workshop.
b
Left dipped beamLeft dipped beam or
Right dipped beamRight 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 111).
or
X
Consult a qualified specialist workshop.
b
Trailer left tailTrailer left tail
lamplamporTrailer rightTrailer right
tail lamp
tail lamp
The left or right-hand trailer tail lamp is faulty.
X
Consult the manufacturer's operating instructions.
b
Trailer left turnTrailer left turn
signalsignalorTrailerTrailer
right turn signal
right turn signal
The left or right-hand trailer turn signal lamp is faulty.
X
Consult the manufacturer's operating instructions.
b
Trailer brake lampTrailer brake lamp
The trailer brake lamp is faulty.
X
Consult the manufacturer's operating instructions.
b
RearRear leftleft indicatorindicator
or Rear right indi‐Rear right indi‐
cator
cator
The rear left-hand or rear right-hand turn signal is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 111).
or
X
Consult a qualified specialist workshop.
228
Display messages
On-board computer and displays
Display messages
Possible causes/consequences and MM Solutions
b
Front left indica‐Front left indica‐
tortor or Front rightFront right
indicator
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 111).
or
X
Consult a qualified specialist workshop.
b
Left mirror indica‐Left mirror indica‐
tortor or Right mirrorRight mirror
indicator
indicator
The turn signal in the left-hand or right-hand exterior mirror is faulty.
X
Consult a qualified specialist workshop.
b
Third brake lampThird brake lamp
The third brake lamp is faulty.
X
Consult a qualified specialist workshop.
b
Left brakeLeft brake
lamplamporRight brakeRight brake
lamp
lamp
The left or right-hand brake lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 111).
or
X
Consult a qualified specialist workshop.
b
Left-handLeft-hand tailtail lamp/lamp/
brake lampbrake lamp or Right-Right-
hand tail lamp/
hand tail lamp/
brake lampbrake 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 111).
or
X
Consult a qualified specialist workshop.
b
Left main beamLeft main beam or
Right main beamRight main beam
The left or right-hand main-beam headlamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 111).
or
X
Consult a qualified specialist workshop.
b
Number plate lampNumber plate lamp
The left or right-hand licence plate lamp is faulty.
X
Consult a qualified specialist workshop.
b
Rear fog lampRear fog lamp
The rear foglamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 111).
or
X
Consult a qualified specialist workshop.
b
Front left parkingFront left parking
lamplamp or Front rightFront right
parking lamp
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 111).
or
X
Consult a qualified specialist workshop.
Display messages
229
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
b
Reversing lightReversing light
The reversing lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 111).
or
X
Consult a qualified specialist workshop.
b
Left tail lampLeft tail lamp or
Right tail lampRight tail lamp
The left or right-hand tail lamp is faulty.
X
Consult a qualified specialist workshop.
b
Left daytime driv‐Left daytime driv‐
ing lamping lamp or RightRight
daytime
daytime drivingdriving lamplamp
The left or right-hand daytime driving lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 111).
or
X
Consult a qualified specialist workshop.
b
MalfunctionMalfunction SeeSee Own‐Own‐
er's Manualer's Manual
The exterior lighting is faulty.
X
Consult a qualified specialist workshop.
Vehicles with trailer tow hitch: a fuse may have blown.
X
Stop the vehicle, paying attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 155).
X
Check the fuses (Y page 308).
X
If necessary, replace the blown fuse. Observe the warning notes as
you do so.
If the multifunction display still shows the display message:
X
Consult a qualified specialist workshop.
b
AUTO lights inoper‐AUTO lights inoper‐
ativeative
The light sensor is faulty.
X
Consult a qualified specialist workshop.
b
Switch off lightsSwitch off lights
The lights are still switched on when you leave the vehicle. A warning
tone also sounds.
X
Turn the light switch to the à position.
b
Switch on headlampsSwitch on headlamps
You are driving without dipped-beam headlamps.
X
Turn the light switch to the L or à position.
230
Display messages
On-board computer and displays
Display messages
Possible causes/consequences and MM Solutions
Adaptive Main-beamAdaptive Main-beam
Assist currentlyAssist currently
unavailableunavailable SeeSee Own‐Own‐
er's Manualer's Manual
Adaptive Highbeam 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.
X
Clean the windscreen.
If the system detects that the camera is fully operational again, the
Adaptive Main-beam Assist available againAdaptive Main-beam Assist available again message is dis-
played.
Adaptive Highbeam Assist is operational again.
Adaptive Main-beamAdaptive Main-beam
Assist inoperativeAssist inoperative
Adaptive Highbeam Assist is faulty.
X
Consult a qualified specialist workshop.
Engine
Display messages
Possible causes/consequences and MM Solutions
+
Top up coolant SeeTop up coolant See
Owner's ManualOwner'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 283).
If you have to top up the coolant frequently:
X
Contact a qualified specialist workshop and have the engine cooling
system checked.
?
The fan motor is faulty.
X
If the coolant temperature is below 120 †, drive on to the nearest
qualified specialist workshop.
X
Avoid heavy loads on the engine as you do so, e.g. driving in moun-
tainous terrain and stop-start traffic.
Display messages
231
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
?
Coolant Stop vehi‐Coolant Stop vehi‐
cle Switch enginecle Switch engine
offoff
The coolant is too hot.
A warning tone also sounds.
G
WARNING
Never drive with an overheated engine. Driving when your engine has
overheated can cause any fluids that may have leaked into the engine
compartment to catch fire.
In addition, steam from an overheated engine can 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 traffic
conditions, and switch off the engine.
X
Secure the vehicle against rolling away (Y page 155).
X
Wait 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 below 120 †. The engine may otherwise
be damaged.
X
Pay attention to the coolant temperature gauge.
If the temperature increases again:
X
Consult a qualified specialist workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 120 †.
#
See Owner's ManualSee Owner's Manual
The battery is no longer being charged.
A warning tone also sounds.
Possible causes:
R
faulty alternator
R
torn poly-V-belt
R
a malfunction in the electronics
!
Do not continue driving. The engine could otherwise overheat.
X
Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X
Secure the vehicle against rolling away (Y page 155).
X
Consult a qualified specialist workshop.
232
Display messages
On-board computer and displays
Display messages
Possible causes/consequences and MM Solutions
#
Stop vehicle SeeStop vehicle See
Owner's ManualOwner's Manual
The battery is no longer being charged and the battery charge level is
too low.
A warning tone also sounds.
X
Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X
Safeguard the vehicle against rolling away (Y page 155).
X
Observe the instructions in the #
SeeSee Owner'sOwner's ManualManual display
message.
X
Consult a qualified specialist workshop.
4
CheckCheck eng.eng. oiloil lev.lev.
whenwhen nextnext refuellingrefuelling
The engine oil level has dropped to the minimum level.
A warning tone also sounds.
!
Avoid long journeys when there is too little coolant in the cooling
system. Otherwise the engine will be damaged.
X
Check the oil level when next refuelling, at the latest (Y page 282).
X
If necessary, top up the engine oil (Y page 283).
If you have to top up the engine oil frequently:
X
Contact a qualified specialist workshop and have the engine
checked.
Information on approved engine oils can be obtained from any quali-
fied specialist workshop or on the Internet at
m.
4
Add 1 litre engineAdd 1 litre engine
oil when next refu‐oil when next refu‐
ellingelling
The engine oil level has dropped to the minimum level.
!
Avoid long journeys when there is too little coolant in the cooling
system. Otherwise the engine will be damaged.
X
Check the oil level when next refuelling, at the latest (Y page 282).
X
If necessary, top up the engine oil (Y page 283).
If you have to top up the engine oil frequently:
X
Contact a qualified specialist workshop and have the engine
checked.
Information on approved engine oils can be obtained from any quali-
fied specialist workshop or on the Internet at
.
4
Engine oil levelEngine oil level
StopStop vehiclevehicle SwitchSwitch
engine offengine off
The engine oil level is too low. There is a risk of engine damage.
X
Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X
Secure the vehicle against rolling away (Y page 155).
X
Check the engine oil level (Y page 282).
X
If necessary, top up the engine oil (Y page 283).
Display messages
233
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
æ
Reserve fuel levelReserve fuel level
The fuel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated if the fuel level drops
into the reserve range.
X
Refuel at the nearest filling station.
ç
There is very little fuel in the fuel tank.
Operation of the auxiliary heating is deactivated.
X
You must refuel at the nearest filling station.
¸
Replace air cleanerReplace air cleaner
Vehicles with a diesel engine: the engine air filter is dirty and must be
replaced.
X
Consult a qualified specialist workshop.
!
Clean the fuel fil‐Clean the fuel fil‐
terter
Vehicles with a diesel engine: there is water in the fuel filter. The water
must be drained off.
X
Consult a qualified specialist workshop.
Driving systems
Display messages
Possible causes/consequences and MM Solutions
À
Attention Assist:Attention Assist:
Take a break!Take a break!
Based on certain criteria, ATTENTION ASSIST has detected fatigue or
increasing lapses in concentration on the part of the driver. A warning
tone also sounds.
X
If necessary, take a break.
During long journeys, take regular breaks in good time so that you get
enough rest.
À
Attention AssistAttention Assist
inoperativeinoperative
ATTENTION ASSIST is inoperative.
X
Consult a qualified specialist workshop.
ë
OffOff
The HOLD function is deactivated. The vehicle has started to skid.
A warning tone also sounds.
X
Reactivate the HOLD function later (Y page 172).
The HOLD function is deactivated. When the brake pedal is firmly
depressed, an activation condition is no longer fulfilled.
A warning tone also sounds.
X
Check the activation conditions for the HOLD function
(Y page 172).
234
Display messages
On-board computer and displays
Display messages
Possible causes/consequences and MM Solutions
LaneLane KeepingKeeping AssistAssist
currently unavaila‐currently unavaila‐
bleble SeeSee Owner'sOwner's Man‐Man‐
ualual
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 have been no lane markings for an extended period.
R
the lane markings are worn, dark or covered, e.g. by dirt or snow
Once the causes listed above no longer apply, the display message
goes out.
Lane Keeping Assist is operational again.
If the display message does not disappear:
X
Stop the vehicle, paying attention to road and traffic conditions.
X
Safeguard the vehicle against rolling away (Y page 155).
X
Clean the windscreen.
LaneLane KeepingKeeping AssistAssist
inoperativeinoperative
Lane Keeping Assist is faulty.
X
Consult a qualified specialist workshop.
Blind Spot AssistBlind Spot Assist
currently unavaila‐currently unavaila‐
bleble SeeSee Owner'sOwner's Man‐Man‐
ualual
Blind Spot Assist is temporarily inoperative.
Possible causes:
R
The radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio stations or
other sources of electromagnetic radiation.
R
The radar sensor system is outside the operating temperature range
The yellow 9 indicator lamps also light up in the exterior mirrors.
Once the causes listed above no longer apply, the display message
goes out.
Blind Spot Assist is operational again.
If the display message does not disappear:
X
Stop the vehicle, paying attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 155).
X
Restart the engine.
Active Blind SpotActive Blind Spot
Assist not availa‐Assist not availa‐
ble when towing able when towing a
trailertrailer SeeSee Owner'sOwner's
ManualManual.
Blind Spot Assist is deactivated while towing a trailer.
You have established the electrical connection between the trailer and
your vehicle.
X
Press a on the steering wheel to confirm the display message.
Blind Spot AssistBlind Spot Assist
inoperativeinoperative
Blind Spot Assist is malfunctioning.
The yellow 9 indicator lamps also light up in the exterior mirrors.
X
Consult a qualified specialist workshop.
Parking Pilot can‐Parking Pilot can‐
celled
celled
The driver's door is open and the driver's seat belt has not been fas-
tened.
X
Repeat the parking process with the seat belt fastened and the
driver's door closed.
Display messages
235
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
You inadvertently touched the multifunction steering wheel while
steering intervention was active.
X
While steering intervention is active, make sure not to touch the
multifunction steering wheel.
The vehicle has started to skid and ESP
®
has intervened.
X
Use Parking Pilot again later (Y page 180).
Parking Pilot inop‐Parking Pilot inop‐
erativeerative
You have just carried out a large number of turning or parking manoeu-
vres.
Parking Pilot will become available again after approximately ten
minutes (Y page 180).
X
Stop the vehicle, paying attention to road and traffic conditions.
X
Switch off and restart the engine.
If the multifunction display still shows the display message:
X
Consult a qualified specialist workshop.
Parking Assist PARKTRONIC is faulty.
X
Consult a qualified specialist workshop.
Parking Pilot endedParking Pilot ended
The vehicle is parked. A warning tone also sounds.
The display message disappears automatically.
TrafficTraffic SignSign AssistAssist
currently unavaila‐currently unavaila‐
bleble SeeSee Owner'sOwner's Man‐Man‐
ualual
Traffic Sign Assist is 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
Clean the windscreen.
If the system detects that the camera is fully operational, the display
message disappears.
Traffic Sign Assist is operational again.
TrafficTraffic SignSign AssistAssist
inoperativeinoperative
Traffic Sign Assist is faulty.
X
Consult a qualified specialist workshop.
Distance Pilot offDistance Pilot off
Distance Pilot DISTRONIC is deactivated (Y page 167).
If it was not deactivated by the driver, a warning tone also sounds.
Distance PilotDistance Pilot
available againavailable again
Distance Pilot DISTRONIC is operational again after having been tem-
porarily unavailable. You can now reactivate Distance Pilot
DISTRONIC (Y page 167).
236
Display messages
On-board computer and displays
Display messages
Possible causes/consequences and MM Solutions
Distance Pilot cur‐Distance Pilot cur‐
rently unavailablerently unavailable
See Owner's ManualSee Owner's Manual
Distance Pilot DISTRONIC is temporarily inoperative.
Possible causes:
R
The radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio stations or
other sources of electromagnetic radiation.
R
The system is outside the operating temperature range.
R
The on-board voltage is too low.
A warning tone also sounds.
Once the causes listed above no longer apply, the display message
goes out.
Distance Pilot DISTRONIC is operational again.
If the display message does not disappear:
X
Stop the vehicle, paying attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 155).
X
Restart the engine.
DistanceDistance PilotPilot inop‐inop‐
erativeerative
Distance Pilot DISTRONIC is faulty. The situation-dependent braking
assistance function may also have failed.
A warning tone also sounds.
X
Consult a qualified specialist workshop.
Distance Pilot pas‐Distance Pilot pas‐
sivesive
You have depressed the accelerator pedal. Distance Pilot DISTRONIC
is no longer controlling the speed of the vehicle.
X
Remove your foot from the accelerator pedal.
Distance PilotDistance Pilot
- - - km/h- - - km/h
A condition for activating Distance Pilot DISTRONIC has not been met.
X
Check the activation conditions for Distance Pilot DISTRONIC
(Y page 167).
Distance Pilot andDistance Pilot and
Limiter inoperativeLimiter inoperative
Distance Pilot DISTRONIC and speed limiter are faulty. A warning tone
also sounds.
X
Consult a qualified specialist workshop.
Cruise control andCruise control and
Limiter inoperativeLimiter inoperative
Cruise control and speed limiter are faulty.
A warning tone also sounds.
X
Consult a qualified specialist workshop.
Limiter passiveLimiter passive
If you depress the accelerator pedal beyond the pressure point (kick-
down), the limiter is switched to passive mode.
The speed limitation is not active.
X
Drive slower than the stored speed and without kickdown.
X
Call up the last speed stored again.
or
X
Set a new speed.
When the display message disappears, the speed limitation is active.
Display messages
237
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
Cruise controlCruise control
- - - km/h- - - km/h
R
A condition for activating cruise control has not been met.
You have tried to store a speed below 30 km/h, for example.
R
ESP
®
is deactivated The yellow ESP
®
OFF warning lamp is lit.
X
If conditions permit, drive faster than 30 km/h and store the speed.
or
X
Check the activation conditions for cruise control (Y page 162).
or
X
Reactivate ESP
®
(Y page 209).
120 km/h!120 km/h!
MaximumMaximum speedspeed excee‐excee‐
dedded
Only for certain countries: the maximum speed has been exceeded.
In addition, the multifunction display shows 120 km/h!120 km/h!.
X
Drive more slowly.
238
Display messages
On-board computer and displays
Tyres
Display messages
Possible causes/consequences and MM Solutions
TyreTyre pressurepressure CheckCheck
tyre(s)tyre(s)
The tyre pressure loss warning system has detected a significant loss
in pressure.
A warning tone also sounds.
Possible causes:
R
you have changed the positions of the wheels and tyres or fitted new
wheels and tyres
R
the tyre pressure in one or more tyres has dropped
G
WARNING
Underinflated tyres pose the following risks:
R
the tyres may burst, especially as the load and vehicle speed
increase
R
the tyres may wear excessively and/or unevenly, which may greatly
impair tyre traction
R
the driving characteristics, as well as steering and braking, may be
greatly impaired
There is a risk of an accident.
X
Stop the vehicle without making any sudden steering or braking
manoeuvres. Pay attention to the traffic conditions as you do so.
X
Secure the vehicle against rolling away (Y page 155).
X
Check the tyres and, if necessary, follow the instructions for a flat
tyre (Y page 294).
X
Check and, if necessary, correct the tyre pressures.
X
Restart the tyre pressure loss warning system when the tyre pres-
sure is correct (Y page 315).
Check tyre pres‐Check tyre pres‐
sures then restartsures then restart
Run Flat IndicatorRun Flat Indicator
The tyre pressure loss warning system generated a display message
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 315).
Run Flat IndicatorRun Flat Indicator
inoperativeinoperative
The tyre pressure loss warning system is faulty.
X
Consult a qualified specialist workshop.
Rectify tyre pres‐Rectify tyre pres‐
suresure
The tyre pressure is too low in at least one of the tyres, or the tyre
pressure difference between the wheels is too great.
X
Check the tyre pressures at the next opportunity (Y page 315).
X
If necessary, correct the tyre pressure.
X
Restart the tyre pressure monitor (Y page 317).
Display messages
239
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
Check tyre(s)Check tyre(s)
The tyre pressure in one or more tyres has dropped significantly. The
wheel position appears in the multifunction display.
A warning tone also sounds.
G
WARNING
Underinflated tyres pose the following risks:
R
the tyres may burst, especially as the load and vehicle speed
increase
R
the tyres may wear excessively and/or unevenly, which may greatly
impair tyre traction
R
the driving characteristics, as well as steering and braking, may be
greatly impaired
There is a risk of an accident.
X
Stop the vehicle without making any sudden steering or braking
manoeuvres. Pay attention to the traffic conditions as you do so.
X
Secure the vehicle against rolling away (Y page 155).
X
Check the tyres and, if necessary, follow the instructions for a flat
tyre (Y page 294).
X
Check the tyre pressure (Y page 315).
X
If necessary, correct the tyre pressure.
Warning tyre defectWarning tyre defect
The tyre pressure in one or more tyres has dropped suddenly. The
wheel position appears in the multifunction display.
G
WARNING
If you drive with a flat tyre, there is a risk of the following hazards:
R
a flat tyre impairs the ability to steer or brake the vehicle
R
you could lose control of the vehicle
R
continued driving with a flat tyre will cause excessive heat build-up
and possibly a fire
There is a risk of an accident.
X
Stop the vehicle without making any sudden steering or braking
manoeuvres. Pay attention to the traffic conditions as you do so.
X
Secure the vehicle against rolling away (Y page 155).
X
Check the tyres and, if necessary, follow the instructions for a flat
tyre (Y page 294).
TyreTyre press.press. monitormonitor
currently unavaila‐currently unavaila‐
bleble
No signals can be received from the tyre pressure sensors due to
strong RF interference. The tyre pressure monitor is temporarily mal-
functioning.
X
Drive on.
The tyre pressure monitor restarts automatically as soon as the
cause has been rectified.
240
Display messages
On-board computer and displays
Display messages
Possible causes/consequences and MM Solutions
Wheel sensor(s)Wheel sensor(s)
missingmissing
There is no signal from the tyre pressure sensor of one or several tyres.
The pressure of the affected tyre is not displayed in the multifunction
display.
X
Have the faulty tyre pressure sensor replaced at a qualified spe-
cialist workshop.
TyreTyre press.press. monitormonitor
inoperative Noinoperative No
wheel sensorswheel sensors
The wheels fitted do not have suitable tyre pressure sensors. The tyre
pressure monitor is deactivated.
X
Fit wheels with suitable tyre pressure sensors.
The tyre pressure monitor is activated after driving for a few
minutes.
TyreTyre press.press. monitormonitor
inoperativeinoperative
The tyre pressure monitor is faulty.
X
Consult a qualified specialist workshop.
Vehicle
Display messages
Possible causes/consequences and MM Solutions
Depress brake toDepress brake to
start enginestart engine
You have attempted to start the engine with the transmission in posi-
tion N without depressing the brake pedal.
X
Depress the brake pedal.
To shift out of PTo shift out of P
oror N,N, depressdepress brakebrake
and start engineand start engine
You have attempted to shift the transmission to position R or D with-
out starting the engine.
X
Start the engine.
X
Depress the brake pedal.
i
It is only possible to shift the transmission from position P to the
desired position if you depress the brake pedal. Only then can the
parking lock be deactivated. If you do not depress the brake pedal,
the DIRECT SELECT lever can still be moved but the parking lock
remains engaged.
i
At transmission fluid temperatures below Ò20 †you can only shift
out of position P into another transmission position when the
engine is running.
ApplyApply brakebrake toto dese‐dese‐
lect Park (P) posi‐lect Park (P) posi‐
tiontion
You have attempted to shift the transmission to position R, N or D
without depressing the brake pedal.
X
Depress the brake pedal.
Display messages
241
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
Risk of vehicleRisk of vehicle
rolling Transmis‐rolling Transmis‐
sion not in Psion not in P
The driver's door is open or not fully closed and the transmission is in
position R, N or D.
A warning tone also sounds.
G
WARNING
The vehicle may roll away.
There is a risk of an accident.
X
Shift the transmission to position P.
X
Secure the vehicle against rolling away (Y page 155).
X
Close the driver's door fully.
Without changingWithout changing
gear, consult work‐gear, consult work‐
shopshop
You cannot change the transmission position due to a malfunction.
A warning tone also sounds.
If transmission position D is selected:
X
Drive to a qualified specialist workshop without shifting the trans-
mission from position D.
If transmission position R, N or P is selected:
X
Secure the vehicle against rolling away (Y page 155).
X
Consult a qualified specialist workshop.
Only select ParkOnly select Park
(P)(P) whenwhen vehiclevehicle isis
stationarystationary
The vehicle is moving.
X
Stop the vehicle, paying attention to road and traffic conditions.
X
Shift the transmission to position P.
Apply brake toApply brake to
select Rselect R
You have attempted to shift from position D or N to position R.
X
Shift the transmission to position R when the brake pedal is
depressed.
ReversingReversing notnot poss.poss.
Consult workshopConsult workshop
The automatic transmission is malfunctioning. You cannot drive in
reverse.
X
Consult a qualified specialist workshop.
Transmission Mal‐Transmission Mal‐
functionfunction
The automatic transmission is malfunctioning.
X
Consult a qualified specialist workshop.
Transmission Mal‐Transmission Mal‐
function Stopfunction Stop
The automatic transmission is malfunctioning.
X
Stop the vehicle, paying attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 155).
X
Consult a qualified specialist workshop.
242
Display messages
On-board computer and displays
Display messages
Possible causes/consequences and MM Solutions
Stop vehicle ShiftStop vehicle Shift
to P Leave engineto P Leave engine
runningrunning
The automatic transmission has overheated.
X
Drive on carefully.
If the display message disappears, the automatic transmission is
available again.
If the multifunction display still shows the display message:
X
Stop the vehicle, paying attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 155).
X
Wait until the automatic transmission has cooled down and the dis-
play message goes out.
Auxiliary batteryAuxiliary battery
malfunctionmalfunction
The auxiliary battery for the automatic transmission is no longer being
charged.
X
Consult a qualified specialist workshop.
X
Until then, always shift the transmission to position P before you
switch off the engine.
X
Before leaving the vehicle, apply the electric parking brake.
Clutch overheatedClutch overheated
Avoid pulling awayAvoid pulling away
If necessary,If necessary,
quicklyquickly releaserelease andand
engage the clutchengage the clutch
The clutch is under considerable load and the permitted operating
temperature has been exceeded. A warning tone also sounds.
Avoid frequent pulling away and driving at walking pace over longer
distances.
X
Stop the vehicle, paying attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 155).
X
Leave the engine running.
The clutch is cooled more quickly with the engine running.
or
X
If possible, drive on at a steady speed.
X
Remove your foot from the clutch pedal and do not allow the clutch
to slip.
The clutch may also cool down during the journey.
It may take several minutes for it to cool down. When the clutch has
cooled down, the display message disappears. The clutch is fully
operational again.
For engine startFor engine start
depress clutchdepress clutch
You have attempted to start the engine without depressing the clutch
pedal.
X
Depress the clutch pedal.
X
Restart the engine.
The engine has stalled while pulling away, e.g. because the clutch
pedal was released too quickly.
X
Depress the clutch pedal again.
The engine starts automatically.
X
Slowly release the clutch pedal to pull away.
Display messages
243
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
Trans. oil overhea‐Trans. oil overhea‐
ted Drive on withted Drive on with
carecare
Mercedes-AMG vehicles: the transmission oil has overheated.
Manual drive program M and the temporarily active manual drive pro-
gram are no longer available. Engine power output is reduced.
X
Allow the vehicle to cool down.
4matic currently4matic currently
unavailableunavailable
4MATIC has overheated. The vehicle is only driven by the front wheels.
X
Drive on.
The airflow cools 4MATIC more quickly.
When the display message goes out, 4MATIC is available again and
the vehicle is driven by all four wheels.
4matic inoperative4matic inoperative
4MATIC is malfunctioning. The vehicle is only driven by the front
wheels.
X
Consult a qualified specialist workshop.
N
The boot lid is open.
X
Close the boot lid.
M
The bonnet is open.
A warning tone also sounds.
G
WARNING
The open bonnet may then block your view when the vehicle is in
motion.
There is a risk of an accident.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 155).
X
Close the bonnet.
Active bonnet mal‐Active bonnet mal‐
function See Own‐function See Own‐
er's Manualer's Manual
The active bonnet (pedestrian protection) is not active due to a mal-
function or because it has already been triggered.
X
Consult a qualified specialist workshop.
C
At least one door is open. A warning tone also sounds.
X
Close all doors.
244
Display messages
On-board computer and displays
Display messages
Possible causes/consequences and MM Solutions
j
CheckCheck trailertrailer hitchhitch
locklock
The trailer tow hitch is not correctly engaged.
A warning tone also sounds.
G
WARNING
If the ball coupling is not engaged, the trailer may come loose. There
is a risk of an accident.
X
Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X
Secure the vehicle against rolling away (Y page 155).
X
Engage the ball coupling of the trailer tow hitch in the end position
(Y page 197).
&
inoperativeinoperative BatteryBattery
LowLow
The on-board voltage is too low. The auxiliary heating has switched
itself off or cannot be switched on (Y page 126).
X
Drive for a considerable distance.
The battery charges. The auxiliary heating is operational again as
soon as the on-board electrical system voltage is sufficient.
&
inoperative Refuelinoperative Refuel
vehiclevehicle
There is too little fuel in the fuel tank. The auxiliary heating cannot be
switched on (Y page 126).
X
Refuel at the nearest filling station.
&
inoperativeinoperative SeeSee Own‐Own‐
er's Man.er's Man.
The auxiliary heating is temporarily malfunctioning or faulty.
If the vehicle is on a level surface and the engine has cooled down:
X
Make up to four attempts to switch on the auxiliary heating, waiting
several minutes between each attempt (Y page 126).
If the auxiliary heating does not switch on:
X
Consult a qualified specialist workshop.
Ð
Power steering mal‐Power steering mal‐
function See Own‐function See Own‐
er's Manualer's Manual
The power steering assistance is faulty.
A warning tone also sounds.
G
WARNING
You will need to use more force to steer.
There is a risk of an accident.
X
Check whether you are able to apply the extra steering force
required.
If you are able to steer safely:
X
Drive on carefully.
X
Consult a qualified specialist workshop immediately.
If you are unable to steer safely:
X
Do not drive on.
X
Consult a qualified specialist workshop.
Display messages
245
On-board computer and displays
Z
Display messages
Possible causes/consequences and MM Solutions
Ð
Steering malfunc‐Steering malfunc‐
tion See Owner'stion See Owner's
ManualManual
The electric steering lock is malfunctioning.
G
WARNING
The steering may be locked by the electric steering lock.
There is a risk of an accident.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 155).
X
Do not drive on.
X
Consult a qualified specialist workshop.
_
BeforeBefore startingstarting thethe
engine, turn theengine, turn the
steering wheel.steering wheel.
The electric steering lock was unable to unlock the steering.
X
Remove the key from the ignition lock.
X
To unlock the steering, move the steering wheel slightly.
X
Insert the key into the ignition lock again.
TelephoneTelephone NoNo serviceservice
Your vehicle is outside the mobile phone network provider's trans-
mitter/receiver range.
X
Wait until the mobile phone operational readiness symbol appears
in the multifunction display.
¥
Top up washer fluidTop up washer fluid
The washer fluid level in the washer fluid reservoir has dropped below
the minimum.
X
Top up the washer fluid (Y page 284).
Wiper malfunction‐Wiper malfunction‐
inging
The windscreen wipers are defective.
X
Consult a qualified specialist workshop.
Hazard warningHazard warning
lamps malfunction‐lamps malfunction‐
inging
The hazard warning lamps are faulty.
X
Consult a qualified specialist workshop.
Key
Display messages
Possible causes/consequences and MM Solutions
Â
KeyKey doesdoes notnot belongbelong
to vehicleto vehicle
You have put the wrong key in the ignition lock.
X
Use the correct key.
Â
Replace keyReplace key
The key needs to be replaced.
X
Consult a qualified specialist workshop.
Â
ChangeChange keykey batteriesbatteries
The key battery is discharged.
X
Change the battery(Y page 79).
246
Display messages
On-board computer and displays
Display messages
Possible causes/consequences and MM Solutions
Â
Key not detectedKey not detected
(red display message)
The key is not in the vehicle.
A warning tone also sounds.
If the engine is switched off, you can no longer lock the vehicle cen-
trally or start the engine.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 155).
X
Locate the key.
Because there is interference from a strong source of radio waves, the
key is not detected whilst the engine is running.
A warning tone also sounds.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 155).
X
Insert the key into the ignition lock and bring into key mode.
Â
Key not detectedKey not detected
(white display message)
The key is currently undetected.
X
Change the location of the key in the vehicle.
If the key still cannot be detected:
X
Operate the vehicle with the key in the ignition lock if necessary.
Â
RemoveRemove startingstarting but‐but‐
ton,ton, thenthen insertinsert keykey
The key is continually undetected.
The key detection function has a temporary malfunction or is faulty. A
warning tone also sounds.
X
Insert the key into the ignition lock and turn it to the desired posi-
tion.
X
Consult a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster
General notes
Some systems perform a self test when the ignition is switched on. Some warning and indicator
lamps may temporarily switch on or flash during the test. This behaviour is nothing to be concerned
about.
The warning and indicator lamps will alert you to a malfunction if they switch on or flash after the
engine is started or while driving.
Warning and indicator lamps in the instrument cluster
247
On-board computer and displays
Z

Related Topics

On-board computer and displays
Important safety notes Displays and operation Menus and submenus Warning and indicator lamps in the instrument cluster

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