2014-2021 Mercedes C Class 4 Door Display messages and warning/indicator lamps -> Display messages User Manual
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Display messages and warning/indicator lamps -> Display messages for Your Mercedes C Class 4 Door Fourth Generation (2014-2021)

444 Display messages and warning/indicator lamps  
mation on the media display. Press the ¨  
Display messages  
Introduction  
symbol to hide the display message.  
You can hide low-priority display messages by  
pressing the P button or the left-hand Touch  
Control. The display messages will then be  
stored in the message memory.  
Information about display messages  
Display messages appear on the multifunction  
display.  
Display messages with graphic symbols are sim‐  
Rectify the cause of a display message as  
quickly as possible.  
High-priority display messages cannot be hid‐  
den. The multifunction display shows these dis‐  
play messages continuously until the cause of  
the display message has been rectified.  
plified in the Owner's Manual and may differ  
from the symbols on the multifunction display.  
The multifunction display shows high-priority dis‐  
play messages in red. Certain display messages  
are accompanied by a warning tone.  
Please act in accordance with the display mes‐  
sages and follow the additional notes in the  
Owner's Manual.  
For some display messages, a symbol will also  
be shown:  
Calling up saved display messages  
On-board computer:  
4
5
Service  
1 message  
If there are no display messages, No messages  
will appear on the multifunction display.  
R
Õ Further information  
#
Scroll through the display messages by swip‐  
R
¨ Hide display message  
ing upwards or downwards on the left-hand  
Touch Control.  
With the left-hand Touch Control, you can select  
the respective symbol by swiping to the left or  
right. Press the Õ symbol to show further infor‐  
#
To exit the message memory: press the  
P button.  
Display messages and warning/indicator lamps 445  
Occupant safety  
Display messages  
Possible causes/consequences and M Solutions  
* The restraint system is malfunctioning (/ page 36).  
6
&
WARNING Risk of injury due to malfunctions in the restraint system  
Components in the restraint system may be activated unintentionally or not deploy as intended in an accident.  
#
Restraint sys. malfunction  
Consult workshop  
Have the restraint system checked and repaired immediately at a qualified specialist workshop.  
* The corresponding restraint system is malfunctioning (/ page 36).  
6
&
WARNING Risk of injury due to malfunctions in the restraint system  
Components in the restraint system may be activated unintentionally or not deploy as intended in an accident.  
#
Front left malfunction Con-  
sult workshop (example)  
Have the restraint system checked and repaired immediately at a qualified specialist workshop.  
* The corresponding window airbag is malfunctioning (/ page 36).  
6
&
WARNING Risk of injury or fatal injury due to a malfunction in the windowbag  
The windowbag might be triggered unintentionally or might not be triggered at all in the event of an accident.  
#
Left windowbag malfunc-  
tion Consult work-  
shop (example)  
Have the windowbag checked and repaired immediately at a qualified specialist workshop.  
446 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
* The front passenger airbag has been disabled even though an adult or a person of adult build is on the front  
passenger seat. If additional forces are applied to the seat, the weight the system detects may be too low.  
Front-passenger airbag dis-  
abled See Owner's Manual  
&
WARNING ‑ Risk of injury or even fatal injury when the front passenger airbag is disabled  
If the front passenger airbag is disabled, It will not be deployed in the event of an accident and cannot perform  
its intended protective function.  
A person in the front passenger seat could then, for example, come into contact with the vehicle interior, espe‐  
cially if the person is sitting too close to the dashboard.  
#
Be aware of the status of the front passenger airbag both before and during the journey.  
#
Stop the vehicle immediately in accordance with the traffic conditions.  
Make sure that no objects are trapped under the front passenger seat.  
Check the status of automatic front passenger airbag actuation (/ page 46).  
If necessary, consult a qualified specialist workshop immediately.  
#
#
#
* The front passenger airbag will be enabled while the vehicle is in motion in the following situations:  
Front-passenger airbag  
enabled See Owner's Man-  
ual  
R
even when a child, a small adult or an object weighing less than the system weight threshold is located on the  
front passenger seat  
R
even when the front passenger seat is not occupied  
The system may detect objects or forces that are adding to the weight applied to the seat.  
Display messages and warning/indicator lamps 447  
Display messages  
Possible causes/consequences and M Solutions  
&
WARNING Risk of injury or fatal injury when using a child restraint system while the front passenger airbag  
is enabled  
If you secure a child in a child restraint system on the front passenger seat and the front passenger airbag is  
enabled, the front passenger airbag may deploy in the event of an accident.  
The child could be struck by the airbag.  
#
Both before and during the journey, ensure that the status of the front passenger airbag is correct.  
NEVER use a rearward facing child restraint on a seat protected by an ACTIVE AIRBAG in front of it, DEATH or  
SERIOUS INJURY to the child can occur.  
#
Stop the vehicle immediately in accordance with the traffic conditions.  
Make sure that no objects are trapped under the front passenger seat.  
Check the status of automatic front passenger airbag actuation (/ page 46).  
If necessary, consult a qualified specialist workshop immediately.  
#
#
#
The PRE‑SAFE® functions are malfunctioning.  
*
PRE-SAFE inoperative See  
Owner's Manual  
#
Consult a qualified specialist workshop.  
448 Display messages and warning/indicator lamps  
Key  
Display messages  
Possible causes/consequences and M Solutions  
* Only a few or no authorisations remain for starting the engine.  
#
Order a new digital vehicle key sticker from a Mercedes-Benz service centre.  
À
Replace key See Owner's  
Manual  
* The key needs to be replaced.  
#
Consult a qualified specialist workshop.  
Á
Replace key  
* The key battery is discharged.  
#
Replace the battery (/ page 72).  
Á
Change key batteries  
Display messages and warning/indicator lamps 449  
Display messages  
Possible causes/consequences and M Solutions  
* The key is currently undetected.  
#
Change the location of the key in the vehicle.  
If the key is still not recognised, place it in the slot for starting with the key (/ page 152).  
Á
#
Key not detected (white dis‐  
play message)  
* The key cannot be detected and may no longer be in the vehicle.  
The key is no longer in the vehicle and you switch off the engine:  
Á
R
You can no longer start the engine.  
Key not detected (red dis‐  
R
You cannot centrally lock the vehicle.  
play message)  
#
Ensure that the key is in the vehicle.  
If the key detection function has a malfunction due to a strong radio signal source:  
#
Stop the vehicle immediately in accordance with the traffic conditions.  
#
Place the key in the slot for starting the engine with the key (/ page 152).  
* Key detection is malfunctioning.  
Place the key in the  
marked space See Owner's  
Manual  
#
Change the location of the key in the vehicle.  
#
Place the key in the slot for starting the engine with the key (/ page 152).  
450 Display messages and warning/indicator lamps  
Lights  
Display messages  
Possible causes/consequences and M Solutions  
* The corresponding light source is defective.  
#
Drive on carefully.  
Consult a qualified specialist workshop immediately.  
:
#
Left dipped beam (example)  
or  
#
Check whether you are permitted to replace the light source yourself (/ page 130).  
% LED light sources: the display message for the corresponding light appears only when all the light-emitting  
diodes in the light are faulty.  
* The exterior lighting is malfunctioning.  
#
Consult a qualified specialist workshop.  
:
* Vehicles with a trailer hitch: a fuse may have blown.  
#
Malfunction See Owner's  
Manual  
Stop the vehicle in accordance with the traffic conditions.  
Check the fuses and replace them if necessary (/ page 405).  
#
* The light sensor is malfunctioning.  
#
Consult a qualified specialist workshop.  
:
Automatic driving lights  
inoperative  
Display messages and warning/indicator lamps 451  
Display messages  
Possible causes/consequences and M Solutions  
* The active headlamps are malfunctioning.  
#
Consult a qualified specialist workshop.  
:
Active Light System inoper-  
ative  
* You are driving without low-beam headlamps.  
#
Turn the light switch to the L or à position.  
:
Switch on headlamps  
* You are leaving the vehicle and the lights are still switched on.  
#
Turn the light switch to the à position.  
:
Switch off lights  
* The Intelligent Light System is malfunctioning. The lighting system continues to function properly without the func‐  
tions of the Intelligent Light System.  
:
#
Consult a qualified specialist workshop.  
Intelligent Light System  
inoperative  
452 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
* Adaptive Highbeam Assist is temporarily unavailable.  
The system limits have been reached (/ page 125).  
Adaptive Highbeam Assist  
currently unavailable See  
Owner's Manual  
Once the cause of the problem is no longer present, the system will be available again. The Adaptive Highbeam  
Assist available again display message will appear.  
#
Drive on.  
* Adaptive Highbeam Assist is malfunctioning.  
Adaptive Highbeam Assist  
inoperative  
#
Consult a qualified specialist workshop.  
* The camera view is restricted. Possible causes:  
Adaptive Highbeam Assist  
Camera view restricted  
See Owner's Manual  
R
dirt on the windscreen in the camera's field of vision  
R
heavy rain, snow or fog  
Driving systems and driving safety systems may be malfunctioning or temporarily unavailable.  
Once the cause of the problem is no longer present, the driving systems and driving safety systems will be available  
again.  
If the display message does not disappear:  
#
Stop the vehicle in accordance with the traffic conditions.  
#
Clean the windscreen.  
Display messages and warning/indicator lamps 453  
Display messages  
Possible causes/consequences and M Solutions  
* Adaptive Highbeam Assist Plus is temporarily unavailable.  
The system limits have been reached (/ page 127).  
Adaptive Highbeam Assist  
Plus currently unavailable  
See Owner's Manual  
Once the cause of the problem is no longer present, the system will be available again. The Adaptive Highbeam  
Assist Plus available again display message will appear.  
#
Drive on.  
* Adaptive Highbeam Assist Plus is malfunctioning.  
Adaptive Highbeam Assist  
Plus inoperative  
#
Consult a qualified specialist workshop.  
* The camera view is restricted. Possible causes:  
Adaptive Highbeam Assist  
Plus Camera view restric-  
ted See Owner's Manual  
R
dirt on the windscreen in the camera's field of vision  
R
heavy rain, snow or fog  
Driving systems and driving safety systems may be malfunctioning or temporarily unavailable.  
Once the cause of the problem is no longer present, the driving systems and driving safety systems will be available  
again.  
If the display message does not disappear:  
#
Stop the vehicle in accordance with the traffic conditions.  
#
Clean the windscreen.  
* The hazard warning lamp switch is malfunctioning.  
Hazard warning lamps mal-  
functioning  
#
Consult a qualified specialist workshop.  
454 Display messages and warning/indicator lamps  
Climate control  
Display messages  
Possible causes/consequences and M Solutions  
* The stationary heater is temporarily malfunctioning.  
#
When the vehicle is stationary on a level surface and the engine has cooled down, make up to four attempts to  
&
switch on the stationary heater, waiting several minutes between each attempt.  
#
inoperative See Owner's  
Man.  
If the stationary heater does not switch on, consult a qualified specialist workshop.  
* The on-board electrical system voltage is too low.  
The stationary heater has switched itself off.  
&
#
Drive an extended distance until the battery has reached a sufficient charge level again.  
inoperative Battery low  
* There is too little fuel in the fuel tank. The stationary heater cannot be switched on.  
#
Refuel the vehicle.  
&
inoperative Refuel vehicle  
Display messages and warning/indicator lamps 455  
Vehicle  
Display messages  
Possible causes/consequences and M Solutions  
* You are leaving the vehicle when it is in a ready-to-drive state.  
#
When you leave the vehicle, switch off the ignition, secure the vehicle against rolling away and take the key with  
you.  
If you do not leave the vehicle, switch off the electrical consumers, e.g. the seat heating. Otherwise, the 12 V  
battery may discharge and it will then be possible to start the vehicle only with the aid of a second battery  
(starting assistance).  
d
#
Vehicle is operational  
Switch off ignition before  
exiting  
* The trailer hitch is not operational during a journey with a trailer.  
ï
&
WARNING Risk of an accident if the ball neck is not locked  
The trailer may become detached.  
#
Check trailer hitch lock  
Stop the vehicle immediately in accordance with the traffic conditions. Do not continue driving.  
#
Uncouple the trailer and secure it against rolling away.  
#
Initiate a new swivel movement and do not re-couple the trailer until the warning/indicator lamp goes out.  
#
Initiate a new swivel movement and, at the same time, pull and hold the button on the boot lid until the ball  
neck engages beneath the bumper (/ page 237).  
#
When the display message disappears, couple up the trailer and drive on.  
If the display message does not disappear, the trailer hitch is malfunctioning and the ball neck is not locked.  
456 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
#
Do not couple up the trailer. Drive on without the trailer. Note the reduced ground clearance due to the  
unlocked ball neck.  
#
Consult a qualified specialist workshop.  
* The trailer hitch will not be operational when the vehicle is stationary.  
#
Uncouple the coupled trailer and secure it against rolling away.  
#
If the ball neck is retracted: initiate a new swivel movement and, at the same time, pull and hold the button  
on the boot lid until the ball neck engages vertically in the locked position and then engages beneath the  
bumper (/ page 237).  
#
If the ball neck is extended: pull and hold the button on the boot lid until the ball neck engages beneath the  
bumper.  
If the display message does not disappear, the trailer hitch is malfunctioning and the ball neck is not locked.  
#
Do not couple up the trailer. Drive on without the trailer. Note the reduced ground clearance due to the  
unlocked ball neck.  
#
Consult a qualified specialist workshop.  
Display messages and warning/indicator lamps 457  
Display messages  
Possible causes/consequences and M Solutions  
* The power steering assistance is malfunctioning.  
Ù
&
WARNING Risk of an accident due to altered steering characteristics  
If the power assistance of the steering fails partially or completely, you will need to use more force to steer.  
#
Steering malfunction  
Increased physical effort  
See Owner's Manual  
If safe steering is possible, drive on carefully.  
Visit or consult a qualified specialist workshop immediately.  
#
* The steering is malfunctioning. Steering capability is significantly impaired.  
Ù
&
WARNING Risk of accident if steering capability is impaired  
If the steering does not function as intended, the vehicle's operating safety is jeopardised.  
#
Steering malfunction Stop  
immediately See Owner's  
Manual  
Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions.  
Do not continue driving under any circumstances.  
#
Consult a qualified specialist workshop.  
* The active bonnet (pedestrian protection) is malfunctioning or inoperative after having already been triggered.  
Active bonnet malfunction  
See Owner's Manual  
#
Consult a qualified specialist workshop.  
* At least one door is open.  
#
Close all doors.  
C
458 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
* The bonnet is open.  
M
&
WARNING Risk of accident due to driving with the bonnet unlocked  
The bonnet may open and block your view.  
#
Never release the bonnet when driving.  
#
Before every trip, ensure that the engine bonnet is locked.  
#
Stop the vehicle immediately, paying attention to road and traffic conditions.  
Close the bonnet.  
#
* The boot lid is open.  
N
&
DANGER Risk of exhaust gas poisoning  
Combustion engines emit poisonous exhaust gases such as carbon monoxide. Exhaust gases can enter the  
vehicle interior if the boot lid is open when the engine is running, especially if the vehicle is in motion.  
#
Always switch off the engine before opening the boot lid.  
#
Never drive with the boot lid open.  
#
Close the boot lid.  
Display messages and warning/indicator lamps 459  
Display messages  
Possible causes/consequences and M Solutions  
* The seat backrest of the corresponding seat is not engaged.  
#
Fold the seat backrest back until it engages.  
_
Rear left seat backrest not  
locked (Example)  
* Vehicles with manual transmission: the electric steering lock was unable to unlock the steering.  
#
Switch the ignition off.  
To unlock the steering, move the steering wheel slightly to the left and right.  
Switch the ignition back on.  
û
#
Before starting the engine,  
turn the steering wheel.  
#
* Vehicles with manual transmission: the electric steering lock is malfunctioning. The steering may be locked by  
the electric steering lock.  
Ù
&
WARNING Risk of accident if steering capability is impaired  
Steering malfunction See  
Owner's Manual  
If the steering does not function as intended, the vehicle's operating safety is jeopardised.  
#
Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions.  
Do not continue driving under any circumstances.  
#
Consult a qualified specialist workshop.  
#
Stop the vehicle immediately in accordance with the traffic conditions. Do not continue driving.  
460 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
#
Consult a qualified specialist workshop.  
* The washer fluid level in the washer fluid reservoir has dropped below the minimum.  
#
Top up the washer fluid (/ page 378).  
¥
Top up washer fluid  
Engine  
Display messages  
Possible causes/consequences and M Solutions  
* You have pressed the start/stop button while the vehicle is in motion.  
To switch off the engine,  
press Start/Stop button  
for at least 3 seconds or 3  
times.  
#
Information about switching off the engine while driving (/ page 150).  
* The coolant level is too low.  
+
NOTE Engine damage due to insufficient coolant  
*
#
Top up coolant See Own-  
er’s Manual  
Avoid long journeys with insufficient coolant.  
#
Add coolant (/ page 377).  
Display messages and warning/indicator lamps 461  
Display messages  
Possible causes/consequences and M Solutions  
#
Have the engine cooling system checked at a qualified specialist workshop.  
* The coolant is too hot.  
#
Stop the vehicle immediately in accordance with the traffic conditions and switch off the engine.  
ÿ
Coolant Stop vehicle  
Switch engine off  
&
WARNING Danger of burns when opening the bonnet  
If you open the engine bonnet when the engine has overheated or during a fire in the engine compartment, you  
could come into contact with hot gases or other escaping operating fluids.  
#
Before opening the bonnet, allow the engine to cool down.  
#
In the event of a fire in the engine compartment, keep the engine bonnet closed and call the fire service.  
#
Wait until the engine has cooled down.  
#
#
Make sure that the air supply to the radiator is not obstructed.  
Avoiding high loads on the engine, drive to the nearest qualified specialist workshop. In doing so, ensure that  
the coolant temperature display remains below 120°C.  
* The fan motor is defective.  
#
Avoiding high loads on the engine, drive to the nearest qualified specialist workshop. In doing so, ensure that  
the coolant temperature display remains below 120 °C.  
ÿ
462 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
* The fuel supply has dropped into the reserve range.  
#
Refuel.  
8
Reserve fuel level  
* Vehicles with diesel engines: the fuel filter is dirty or the water in the fuel filter needs to be drained.  
#
Consult a qualified specialist workshop.  
!
Clean the fuel filter  
* Vehicles with diesel engines: the engine air filter is dirty and must be replaced.  
#
Consult a qualified specialist workshop.  
¸
Replace air cleaner  
Transmission  
Display messages  
Possible causes/consequences and M Solutions  
*
Only select Park (P) when  
vehicle is stationary  
Park position j can be engaged only when the vehicle is stationary.  
#
To stop, depress the brake pedal.  
Display messages and warning/indicator lamps 463  
Display messages  
Possible causes/consequences and M Solutions  
#
Shift the transmission to park position j while the vehicle is stationary.  
*
*
Apply brake to deselect  
Park (P) position  
You have attempted to shift the transmission out of park position j and into another transmission position.  
#
Depress the brake pedal.  
#
Select transmission position h, k or neutral i.  
To shift out of P or N,  
depress brake and start  
engine  
You have attempted to shift the transmission out of park position j or neutral i and into another transmission  
position.  
#
Depress the brake pedal.  
#
Start the engine.  
#
Change the transmission position.  
*
Apply brake to select R  
You have attempted to select transmission position k.  
#
Depress the brake pedal.  
#
Select transmission position k.  
*
*
Risk of vehicle rolling  
Driver door open and trans-  
mission not in P  
The driver's door is not fully closed and transmission position h, k or neutral i is selected.  
#
Select park position j when switching off the vehicle.  
N permanently active Risk  
of vehicle rolling  
While the vehicle is rolling or while you are driving, neutral i has been engaged.  
#
To stop, depress the brake pedal.  
#
Shift the transmission to park position j while the vehicle is stationary.  
464 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
#
To continue driving, select transmission position h or k.  
* The transmission is malfunctioning. The transmission position can no longer be changed.  
Without changing gear,  
consult workshop  
#
When transmission position h is selected, consult a qualified specialist workshop and do not change the trans‐  
mission position.  
#
For all other transmission positions, park the vehicle safely.  
#
Consult a qualified specialist workshop.  
*
*
Reversing not poss. Con-  
sult workshop  
The transmission is malfunctioning. The transmission position k cannot be selected.  
#
Consult a qualified specialist workshop.  
Transmission Malfunction  
Stop  
The transmission is malfunctioning. The transmission shifts to neutral i automatically.  
#
Stop the vehicle immediately in accordance with the traffic conditions.  
#
Depress the brake pedal.  
#
Engage park position j.  
#
Consult a qualified specialist workshop.  
* The transmission is overheating. Pulling away may be temporarily impaired or not possible.  
Stop vehicle Leave engine  
running Wait Transmission  
cooling  
#
Stop the vehicle immediately in accordance with the traffic conditions. Do not continue driving.  
#
Leave the engine running.  
#
Wait until the display message disappears before pulling away.  
Display messages and warning/indicator lamps 465  
Display messages  
Possible causes/consequences and M Solutions  
* You have attempted to start the engine without depressing the clutch pedal.  
Depress clutch fully to  
start engine  
#
Depress the clutch pedal and then start the engine.  
* The engine has stalled while the vehicle was pulling away, e.g. because the clutch pedal was released too quickly.  
#
Depress the clutch pedal again.  
The engine will start automatically.  
#
Slowly release the clutch pedal to pull away.  
* The clutch is overheating.  
Clutch overheated Avoid  
pulling away for XX:XX mins  
Avoid pulling away for the period shown.  
* The auxiliary battery for the transmission is no longer being charged.  
Auxiliary battery malfunc-  
tion  
#
Consult a qualified specialist workshop.  
#
Until then, always select park position j manually before you switch off the engine.  
#
Before leaving the vehicle, apply the electric parking brake.  
466 Display messages and warning/indicator lamps  
Brakes  
Display messages  
Possible causes/consequences and M Solutions  
*
The yellow ! indicator lamp is lit. The electric parking brake is malfunctioning.  
To apply:  
!
#
Switch the ignition off and switch it back on.  
Parking brake See Owner's  
Manual  
#
Apply the electric parking brake manually (/ page 182).  
If it is not possible to apply the electric parking brake:  
#
Consult a qualified specialist workshop.  
#
Where necessary, also secure the parked vehicle against rolling away.  
*
The yellow ! indicator lamp and the red ! indicator lamp are lit. The electric parking brake is malfunction‐  
ing.  
To release:  
#
Switch the ignition off and switch it back on.  
#
Release the electric parking brake manually (/ page 182).  
or  
#
Release the electric parking brake automatically (/ page 181).  
If it is still not possible to release the electric parking brake:  
#
Do not continue driving. Consult a qualified specialist workshop.  
Display messages and warning/indicator lamps 467  
Display messages  
Possible causes/consequences and M Solutions  
*
The yellow ! indicator lamp is lit and the red ! indicator lamp is flashing. The electric parking brake is mal‐  
functioning.  
The electric parking brake could not be applied or released.  
#
Switch the ignition off and switch it back on.  
To apply:  
#
Release and then apply the electric parking brake manually (/ page 182).  
To release:  
#
Apply and then release the electric parking brake manually.  
If it is not possible to apply the electric parking brake or the red ! indicator lamp continues to flash:  
#
Do not continue driving. Consult a qualified specialist workshop.  
#
Where necessary, also secure the parked vehicle against rolling away.  
*
The yellow ! indicator lamp is lit and the red ! indicator lamp flashes for approximately ten seconds after  
the electric parking brake has been applied or released. It then remains lit or goes out. The electric parking brake is  
malfunctioning.  
If the charge level is too low:  
#
Charge the 12 V battery.  
To apply:  
468 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
#
Switch the ignition off.  
The electric parking brake will be applied automatically.  
If you do not want the electric parking brake to be applied, e.g. at an automatic car wash or when the vehicle is  
being towed, leave the ignition switched on. This does not include having the vehicle towed with the rear axle  
raised.  
If the electric parking brake is not applied automatically:  
#
Switch the ignition off and switch it back on.  
#
Release and then apply the electric parking brake manually (/ page 182).  
If it is still not possible to apply the electric parking brake:  
#
Consult a qualified specialist workshop.  
#
Where necessary, also secure the parked vehicle against rolling away.  
To release:  
#
If the conditions for automatic release are fulfilled and the electric parking brake is not released automatically,  
release the electric parking brake manually (/ page 182).  
If it is still not possible to release the electric parking brake:  
#
Do not continue driving. Consult a qualified specialist workshop.  
Display messages and warning/indicator lamps 469  
Display messages  
Possible causes/consequences and M Solutions  
*
The red ! indicator lamp is flashing.  
The electric parking brake is applied while you are driving:  
!
R
A condition for automatic release of the electric parking brake has not been fulfilled (/ page 181).  
You are performing emergency braking using the electric parking brake (/ page 182).  
Release parking brake  
R
#
#
Check the conditions for automatic release of the electric parking brake.  
Release the electric parking brake manually.  
*
The red ! indicator lamp is lit.  
You have attempted to release the electric parking brake with the ignition switched off.  
!
#
Switch on the ignition.  
Turn on the ignition to  
release the parking brake  
* Vehicles with manual transmission: the electric parking brake has not been applied and you open the driver's  
door.  
Risk of vehicle rolling away  
Parking brake not applied  
See Owner's Manual  
#
Apply the electric parking brake.  
* Vehicles with manual transmission: a malfunction has occurred while the HOLD function was activated.  
A horn may also sound at regular intervals. If you attempt to lock the vehicle, the horn will become louder.  
You cannot start the engine.  
J
Brake immediately  
470 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
#
Immediately depress the brake pedal firmly until the display message disappears.  
You can restart the engine.  
* There is insufficient brake fluid in the brake fluid reservoir.  
J
&
WARNING Risk of an accident due to low brake fluid level  
If the brake fluid level is too low, the braking effect and the braking characteristics may be impaired.  
#
Check brake fluid level  
Stop the vehicle as soon as possible, paying attention to road and traffic conditions. Do not continue driv‐  
ing.  
#
Consult a qualified specialist workshop.  
#
Do not top up the brake fluid.  
* The brakepads have reached the wear limit.  
#
Consult a qualified specialist workshop.  
#
Check brake pads See  
Owner's Manual  
Display messages and warning/indicator lamps 471  
Driving systems  
Display messages  
Possible causes/consequences and M Solutions  
* Cruise control cannot be activated as not all activation conditions are fulfilled.  
#
Observe the activation conditions for cruise control (/ page 195).  
¯
- - - km/h  
* Cruise control is malfunctioning.  
Cruise control inoperative  
#
Consult a qualified specialist workshop.  
* Cruise control and the limiter are malfunctioning.  
Cruise control and Limiter  
inoperative  
#
Consult a qualified specialist workshop.  
* Cruise control has been deactivated.  
Cruise control off  
If there is an additional warning tone, cruise control has been deactivated automatically (/ page 193).  
* The limiter cannot be activated as not all activation conditions have been fulfilled.  
#
Observe the activation conditions of the limiter (/ page 195).  
È
- - - km/h  
* If you depress the accelerator pedal beyond the pressure point (kickdown), the limiter is switched to passive mode  
(/ page 195).  
Limiter passive  
472 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
* The limiter is malfunctioning.  
Limiter inoperative  
#
Consult a qualified specialist workshop.  
* Active Distance Assist DISTRONIC cannot be activated as not all activation conditions are fulfilled.  
#
Comply with the activation conditions of Active Distance Assist DISTRONIC (/ page 199).  
ç
- - - km/h  
* If you depress the accelerator pedal beyond the Active Distance Assist DISTRONIC setting, the system will switch  
to passive mode (/ page 196).  
ç
suspended  
* Active Distance Assist DISTRONIC was deactivated. If a warning tone also sounds, Active Distance Assist  
DISTRONIC has deactivated automatically (/ page 199).  
ç
Off  
* Active Distance Assist DISTRONIC is temporarily unavailable.  
The ambient conditions are outside the system limits (/ page 196).  
As soon as the ambient conditions are within the system limits, the system will become available again.  
Active Distance Assist cur-  
rently unavailable See Own-  
er's Manual  
#
Drive on.  
Display messages and warning/indicator lamps 473  
Display messages  
Possible causes/consequences and M Solutions  
* Active Distance Assist DISTRONIC is malfunctioning.  
Other driving systems and driving safety systems may also be malfunctioning.  
Active Distance Assist inop-  
erative  
#
Consult a qualified specialist workshop.  
* Active Distance Assist DISTRONIC is operational again and can be activated (/ page 199).  
Active Distance Assist  
available again  
* You have exceeded the maximum permissible speed (for certain countries only).  
#
Drive more slowly.  
ð
Maximum speed exceeded  
* You have reached the maximum permissible stored speed for winter tyres. It is not possible to exceed this speed.  
Speed limit (winter tyres)  
XXX km/h  
* Active Steering Assist is temporarily unavailable.  
The ambient conditions are outside the system limits (/ page 203).  
As soon as the ambient conditions are within the system limits, the system will become available again.  
Active Steering Assist cur-  
rently unavailable See Own-  
er's Manual  
#
Drive on.  
#
If necessary, clean the windscreen in the camera's field of vision.  
#
Check the tyre pressure if necessary.  
474 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
* Active Steering Assist is malfunctioning. Active Distance Assist DISTRONIC remains available.  
Active Steering Assist inop-  
erative  
#
Consult a qualified specialist workshop.  
* Active Steering Assist is temporarily unavailable due to multiple emergency stops.  
Active Steering Assist cur-  
rently unavailable due to  
multiple emergency stops  
#
Take over the steering and stop in accordance with the traffic conditions.  
#
Switch the ignition off and switch it back on.  
Active Steering Assist is available once more.  
* Your hands are not on the steering wheel. An emergency stop is being initiated (/ page 205).  
Beginning emergency stop  
#
Put your hands back on the steering wheel.  
You can cancel the deceleration at any time by performing one of the following actions:  
R
Steering  
R
Braking or accelerating  
R
Deactivating Active Distance Assist DISTRONIC  
* Active Steering Assist has reached the system limits(/ page 203).  
You have not steered independently for a considerable period of time.  
Ø
#
Take over the steering and drive on in accordance with the traffic conditions.  
Display messages and warning/indicator lamps 475  
Display messages  
Possible causes/consequences and M Solutions  
* The HOLD function is deactivated because the vehicle is slipping or a condition for activation is not fulfilled.  
#
Reactivate the HOLD function later or check the activation conditions for the HOLD function (/ page 206).  
ë
Off  
* AIRMATIC is functioning only to a limited extent. The vehicle's handling characteristics may be affected.  
ä
NOTE The tyres on the front axle or the fenders could be damaged by large steering movements  
*
#
Fault Drive at max. 80  
km/h  
Avoid large steering movements while driving and listen for scraping sounds.  
If you hear scraping sounds, pull over and stop the vehicle in accordance with the traffic conditions, and  
set a higher vehicle level if possible.  
#
#
#
Drive in a manner appropriate for the current level, but do not exceed 80 km/h.  
Consult a qualified specialist workshop.  
* DYNAMIC BODY CONTROL is malfunctioning. The vehicle's handling characteristics may be affected.  
#
Do not drive at speeds greater than 80 km/h.  
#
Consult a qualified specialist workshop.  
476 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
* You have pulled away despite the vehicle level being too low.  
#
Stop the vehicle in accordance with the traffic conditions.  
É
The vehicle will be raised to the selected vehicle level.  
#
Stop vehicle Vehicle too  
low  
Wait until the display message disappears before pulling away.  
If the display message does not disappear and a warning tone also sounds, AIRMATIC is malfunctioning:  
#
Do not drive at speeds greater than 80 km/h and consult a qualified specialist workshop immediately.  
NOTE The tyres on the front axle or the fenders could be damaged by large steering movements  
*
#
Avoid large steering movements while driving and listen for scraping sounds.  
#
If you hear scraping sounds, pull over and stop the vehicle in accordance with the traffic conditions, and  
set a higher vehicle level if possible.  
#
Set a higher vehicle level (/ page 209).  
Depending on the malfunction, the vehicle will be raised.  
* The vehicle level may be lowered for the following reasons:  
R
You have selected a different drive program.  
You have exceeded the speed limit.  
You have changed the vehicle level by pressing the button.  
¢
R
Lowering  
R
Display messages and warning/indicator lamps 477  
Display messages  
Possible causes/consequences and M Solutions  
* Your vehicle is adjusting to the level you have selected.  
É
Vehicle rising  
* The vehicle level is too low. The vehicle will be raised to the selected vehicle level.  
#
Wait until the display message disappears before pulling away.  
É
Vehicle rising Please wait  
* You are driving too fast for the selected vehicle level.  
#
To adjust the vehicle level, you must not drive at speeds greater than 60 km/h.  
To adjust the vehicle level during trailer operation, you must not drive at speeds greater than 30 km/h.  
É
Parking Assist and  
#
Please reduce speed  
* Vehicles with Active Parking Assist: Active Parking Assist and Parking Assist PARKTRONIC are malfunctioning.  
Vehicles without Active Parking Assist: Parking Assist PARKTRONIC is malfunctioning.  
PARKTRONIC inoperative  
See Owner's Manual  
#
Stop the vehicle in accordance with the traffic conditions and restart the engine.  
#
If the display message still appears, consult a qualified specialist workshop.  
478 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
* The Parking Assist manoeuvring assistant is temporarily unavailable or only partially available.  
Parking Assist Manoeu-  
vring assistance limited  
See Owner's Manual  
#
Clean all sensors of the parking and camera system (/ page 382).  
#
If the display message still appears, consult a qualified specialist workshop.  
* ATTENTION ASSIST is malfunctioning.  
#
Consult a qualified specialist workshop.  
é
ATTENTION ASSIST inoper-  
ative  
* ATTENTION ASSIST has detected fatigue or an increasing lack of concentration on the part of the driver  
(/ page 227).  
é
#
If necessary, take a break.  
ATTENTION ASSIST: Take a  
break!  
* Traffic Sign Assist is temporarily unavailable.  
Once the cause of the problem is no longer present, the system will be available again.  
Traffic Sign Assist currently  
unavailable See Owner's  
Manual  
#
Drive on.  
#
If the display message does not disappear, stop the vehicle safely and clean the windscreen.  
Display messages and warning/indicator lamps 479  
Display messages  
Possible causes/consequences and M Solutions  
* Traffic Sign Assist is malfunctioning.  
Traffic Sign Assist inopera-  
tive  
#
Stop the vehicle in accordance with the traffic conditions and restart the engine.  
If the display message still appears, consult a qualified specialist workshop.  
#
* The camera view is restricted. Possible causes:  
Traffic Sign Assist Camera  
view restricted See Own-  
er's Manual  
R
dirt on the windscreen in the camera's field of vision  
R
heavy rain, snow or fog  
Driving systems and driving safety systems may be malfunctioning or temporarily unavailable.  
Once the cause of the problem is no longer present, the driving systems and driving safety systems will be available  
again.  
If the display message does not disappear:  
#
Stop the vehicle in accordance with the traffic conditions.  
#
Clean the windscreen.  
* Blind Spot Assist is temporarily unavailable.  
The system limits have been reached (/ page 230).  
Once the cause of the problem is no longer present, the system will be available again.  
Blind Spot Assist currently  
unavailable See Owner's  
Manual  
#
Drive on.  
or  
480 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
#
If the display message does not disappear, stop the vehicle in accordance with the traffic conditions and restart  
the engine.  
#
If necessary, clean the rear bumper. If the bumper is especially dirty, the sensors in the bumper may be mal‐  
functioning.  
* Blind Spot Assist is malfunctioning.  
Blind Spot Assist inopera-  
tive  
#
Consult a qualified specialist workshop.  
* When you establish the electrical connection to the trailer, Blind Spot Assist will be unavailable.  
Blind Spot Assist not availa-  
ble when towing a trailer  
See Owner's Manual  
#
Press the left-hand Touch Control and acknowledge the display message.  
* Active Blind Spot Assist is temporarily unavailable.  
The system limits have been reached (/ page 230).  
Once the cause of the problem is no longer present, the system will be available again.  
Active Blind Spot Assist  
currently unavailable See  
Owner's Manual  
#
Drive on.  
or  
#
If the display message does not disappear, stop the vehicle in accordance with the traffic conditions and restart  
the engine.  
* Active Blind Spot Assist is malfunctioning.  
Active Blind Spot Assist  
inoperative  
#
Consult a qualified specialist workshop.  
Display messages and warning/indicator lamps 481  
Display messages  
Possible causes/consequences and M Solutions  
* When you establish the electrical connection to the trailer, Active Blind Spot Assist will be unavailable.  
Active Blind Spot Assist  
not available when towing  
a trailer See Owner's Man-  
ual  
#
Press the left-hand Touch Control and acknowledge the display message.  
* Active Lane Keeping Assist is temporarily unavailable.  
The ambient conditions are outside the system limits (/ page 233).  
As soon as the ambient conditions are within the system limits, the system will become available again.  
Vehicles with Active Steering Assist: the camera view may be limited by the windscreen.  
Active Lane Keeping Assist  
currently unavailable See  
Owner's Manual  
#
Drive on.  
Vehicles with Active Steering Assist: if the display message does not disappear:  
#
Stop the vehicle in accordance with the traffic conditions.  
#
Clean the windscreen.  
* Active Lane Keeping Assist is malfunctioning.  
Active Lane Keeping Assist  
inoperative  
#
Consult a qualified specialist workshop.  
* Vehicles without Active Steering Assist: the camera view is restricted.  
Active Lane Keeping Assist  
Camera view restricted  
See Owner's Manual  
Possible causes:  
R
dirt on the windscreen in the camera's field of vision  
R
heavy rain, snow or fog  
482 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
Driving systems and driving safety systems may be malfunctioning or temporarily unavailable.  
Once the cause of the problem is no longer present, the driving systems and driving safety systems will be available  
again.  
If the display message does not disappear:  
#
Stop the vehicle in accordance with the traffic conditions.  
#
Clean the windscreen.  
Driving safety systems  
Display messages  
Possible causes/consequences and M Solutions  
ABS and ESP® are temporarily unavailable.  
*
Other driving systems and driving safety systems (e.g. BAS) may also be temporarily unavailable.  
The brake system will continue to operate normally. Braking distance may increase in an emergency braking situa‐  
tion.  
!
÷
WARNING Risk of skidding if ABS and ESP® are malfunctioning  
&
currently unavailable See  
Owner's Manual  
The wheels may lock during braking and ESP® does not perform any vehicle stabilisation.  
The steerability and braking characteristics are heavily impaired and the braking distance may increase. In addi‐  
tion, other driving safety systems are switched off.  
Display messages and warning/indicator lamps 483  
Display messages  
Possible causes/consequences and M Solutions  
#
Drive carefully on a suitable stretch of road, making slight steering movements at a speed above 30 km/h.  
#
If the display message does not disappear, consult a qualified specialist workshop immediately. Drive care‐  
fully.  
ABS and ESP® are malfunctioning.  
*
Other driving systems and driving safety systems (e.g. BAS) may also be malfunctioning.  
The brake system will continue to operate normally. Braking distance may increase in an emergency braking situa‐  
tion.  
!
÷
WARNING Risk of skidding if ABS and ESP® are malfunctioning  
&
inoperative See Owner's  
Manual  
The wheels may block during braking and ESP® does not perform any vehicle stabilization.  
The steerability and braking characteristics are heavily impaired and the braking distance may increase. In addi‐  
tion, other driving safety systems are switched off.  
#
Drive on carefully.  
Have ABS and ESP® checked immediately at a qualified specialist workshop.  
#
484 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
ESP® is temporarily unavailable.  
*
Other driving systems and driving safety systems (e.g. BAS) may also be malfunctioning.  
÷
WARNING Risk of skidding if ESP is malfunctioning®  
&
currently unavailable See  
Owner's Manual  
If ESP® is malfunctioning, ESP® cannot carry out vehicle stabilisation. In addition, other driving safety systems  
are switched off.  
#
Drive carefully on a suitable stretch of road, making slight steering movements at a speed above 30 km/h.  
#
If the display message does not disappear, consult a qualified specialist workshop immediately. Drive care‐  
fully.  
ESP® is malfunctioning.  
*
Other driving systems and driving safety systems (e.g. BAS) may also be malfunctioning.  
The brake system will continue to operate normally. Braking distance may increase in an emergency braking situa‐  
tion.  
÷
inoperative See Owner's  
Manual  
WARNING Risk of skidding if ESP® is malfunctioning  
&
If ESP® is malfunctioning, ESP® cannot carry out vehicle stabilisation. In addition, other driving safety systems  
are switched off.  
#
Drive on carefully.  
Have ESP® checked at a qualified specialist workshop.  
#
Display messages and warning/indicator lamps 485  
Display messages  
T
!
÷
Possible causes/consequences and M Solutions  
EBD, ABS and ESP® are malfunctioning.  
Other driving systems and driving safety systems (e.g. BAS) may also be malfunctioning.  
*
WARNING Risk of skidding if EBD, ABS and ESP® are malfunctioning  
&
The wheels may block during braking and ESP® does not perform any vehicle stabilization.  
The steerability and braking characteristics are heavily impaired and the braking distance may increase. In addi‐  
tion, other driving safety systems are switched off.  
#
Drive on carefully.  
#
inoperative See Owner's  
Manual  
Have the brake system checked immediately at a qualified specialist workshop.  
* Vehicles with the Driving Assistance Package or Blind Spot Assist: Active Brake Assist with cross-traffic func‐  
Active Brake Assist Func-  
tions currently limited See  
Owner's Manual  
tion, Evasive Steering Assist or PRE‑SAFE® PLUS are temporarily unavailable or only partially available.  
Vehicles without the Driving Assistance Package: Active Brake Assist is temporarily unavailable or only partially  
available.  
Vehicles with Blind Spot Assist: PRE‑SAFE® PLUS is temporarily unavailable or only partially available.  
The ambient conditions are outside the system limits (/ page 189).  
As soon as the ambient conditions are within the system limits, the system will become available again.  
#
Drive on.  
486 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
#
If the display message does not disappear, stop the vehicle in accordance with the traffic conditions and restart  
the engine.  
* Vehicles with Driving Assistance Package or Blind Spot Assist: Active Brake Assist with cross-traffic function,  
Active Brake Assist Func-  
tions limited See Owner's  
Manual  
Evasive Steering Assist or PRE‑SAFE® PLUS is malfunctioning.  
Vehicles without Driving Assistance Package: Active Brake Assist is malfunctioning.  
Vehicles with Blind Spot Assist: PRE‑SAFE® PLUS is malfunctioning.  
#
Consult a qualified specialist workshop.  
* The radar sensor system is malfunctioning. Possible causes:  
Radar sensors dirty See  
Owner's Manual  
R
dirt on the sensors  
R
heavy rain or snow  
R
extended country driving without other traffic, e.g. in the desert  
Driving systems and driving safety systems may be malfunctioning or temporarily unavailable.  
Once the cause of the problem is no longer present, the driving systems and driving safety systems will be available  
again.  
If the display message does not disappear:  
#
Stop the vehicle in accordance with the traffic conditions.  
#
Clean all sensors (/ page 382).  
#
Restart the engine.  
Display messages and warning/indicator lamps 487  
Mercedes me connect  
Display messages  
Possible causes/consequences and M Solutions  
* The vehicle functions for fault detection are restricted.  
At least one of the main functions of the Mercedes me connect system is malfunctioning.  
Mercedes me connect  
Services limited See Own-  
er's Manual  
#
Observe the notes on the diagnostics connection (/ page 29).  
#
Consult a qualified specialist workshop.  
* At least one of the main functions of the Mercedes me connect system or of the SOS emergency call system is  
malfunctioning.  
G
#
Consult a qualified specialist workshop.  
Inoperative  
Battery  
Display messages  
Possible causes/consequences and M Solutions  
* The engine is off and the charge level is too low.  
#
Switch off electrical consumers that are not required.  
#
To charge the 12 V battery:  
#
12 V battery See Owner's  
Manual  
Leave the engine running for a few minutes, or drive an extended distance.  
488 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
* If the message appears while the engine is running, this indicates an on-board electrical system malfunction.  
#
Consult a qualified specialist workshop.  
* The 12 V battery is not being charged.  
#
NOTE Possible engine damage if you continue driving  
*
#
See Owner's Manual  
Do not continue driving under any circumstances.  
Consult a qualified specialist workshop.  
#
#
#
Stop the vehicle immediately in accordance with the traffic conditions and switch off the engine.  
Consult a qualified specialist workshop.  
* The 12 V battery is no longer being charged and the charge level is too low.  
#
NOTE Possible engine damage if you continue driving  
*
#
Stop vehicle See Owner's  
Manual  
Do not continue driving under any circumstances.  
Consult a qualified specialist workshop.  
#
#
#
#
Stop the vehicle immediately in accordance with the traffic conditions. Do not continue driving.  
Switch off the engine.  
Consult a qualified specialist workshop.  
Display messages and warning/indicator lamps 489  
Display messages  
Possible causes/consequences and M Solutions  
* The 12 V battery charge level is too low.  
#
Stop the vehicle immediately in accordance with the traffic conditions. Do not continue driving.  
Leave the engine running.  
Wait until the display message disappears before pulling away.  
If the display message does not disappear: consult a qualified specialist workshop.  
#
#
#
#
Stop vehicle Leave engine  
running  
* The 48 V on-board electrical system has function restrictions. Comfort functions may be restricted.  
#
Consult a qualified specialist workshop immediately.  
Û
48 V battery See Owner's  
Manual  
* The 48 V battery is discharged. You have switched on the ignition while the 12 V battery was being charged with a  
suitable charger or while another vehicle was providing starting assistance.  
Ý
The discharged 48 V battery is charged automatically via the voltage converter. After a few minutes, the Motor can  
be started again display message will be shown on the multifunction display.  
Please wait 48 V battery  
charging  
#
Start the engine.  
#
Drive the vehicle for a while to charge the 12 V battery and the 48 V battery after disconnecting the charger  
from the vehicle.  
If the Motor can be started again display message does not appear after a few minutes:  
490 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
#
Try to start the engine again.  
#
If the engine does not start, consult a qualified specialist workshop.  
* The charge level of the 48 V battery is too low. You can no longer start the engine.  
Cannot start engine See  
Owner's Manual  
#
Switch off electrical consumers that are not required.  
#
Connect a suitable charger approved for Mercedes-Benz with sufficient charge output to the jump-start connec‐  
tion point of the 12 V battery (/ page 398).  
The 48 V battery is charged via the voltage converter in the vehicle.  
* The 48 V battery has been charged automatically via the voltage converter.  
Motor can be started again  
#
Start the engine and drive the vehicle for a while to charge the 12 V battery and the 48 V battery.  
Tyre pressure monitor  
Display messages  
Possible causes/consequences and M Solutions  
* There is interference from a powerful radio signal source As a result, no signals from the tyre pressure sensors are  
being received. The tyre pressure monitoring system is temporarily unavailable.  
Tyre press. monitor cur-  
rently unavailable  
The tyre pressure monitoring system will restart automatically as soon as the cause has been rectified.  
#
Drive on.  
* The tyre pressure monitoring system is malfunctioning.  
Tyre press. monitor inoper-  
ative  
Display messages and warning/indicator lamps 491  
Display messages  
Possible causes/consequences and M Solutions  
&
WARNING There is a risk of an accident if the tyre pressure monitoring system is malfunctioning  
The tyre pressure monitoring system cannot issue a warning if there is pressure loss in one or more of the  
tyres.  
Tyres with insufficient tyre pressure may impair the driving characteristics as well as steering and braking.  
#
Have the tyre pressure monitoring system checked at a qualified specialist workshop.  
* The wheels fitted do not have suitable tyre pressure sensors. The tyre pressure monitoring system is deactivated.  
Tyre press. monitor inoper-  
ative No wheel sensors  
#
Fit wheels with suitable tyre pressure sensors.  
* There is no signal from the tyre pressure sensor of one or more wheels. No pressure value is displayed for the  
affected tyre.  
h
#
Have the faulty tyre pressure sensor replaced at a qualified specialist workshop.  
Wheel sensor(s) missing  
* The tyre pressure in one or more tyres has dropped significantly. The wheel position will be displayed.  
h
&
WARNING Risk of an accident due to insufficient tyre pressure  
R
R
R
The tyres can burst.  
Check tyre(s)  
The tyres can wear excessively and/or unevenly.  
The driving characteristics as well as the steering and braking may be greatly impaired.  
492 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
You could then lose control of the vehicle.  
#
Observe the recommended tyre pressures.  
#
Adjust the tyre pressure if necessary.  
#
Stop the vehicle in accordance with the traffic conditions.  
#
Check the tyre pressure (/ page 410) and the tyres.  
* The tyre pressure is too low in at least one of the tyres, or the difference in tyre pressure between the individual  
wheels is too great.  
h
#
Check the tyre pressure and add air, if necessary.  
#
Rectify tyre pressure  
When the tyre pressure is correct, restart the tyre pressure monitor (/ page 413).  
* The tyre pressure in one or more tyres has dropped suddenly. The wheel position will be displayed.  
h
&
WARNING Risk of an accident from driving with a flat tyre  
R
R
The tyres can overheat and cause a fire.  
The driving characteristics as well as the steering and braking may be greatly impaired.  
Warning tyre defect  
You could then lose control of the vehicle.  
#
Do not drive on with a flat tyre.  
#
Observe the notes on flat tyres.  
Display messages and warning/indicator lamps 493  
Display messages  
Possible causes/consequences and M Solutions  
Notes on flat tyres (/ page 388).  
#
Stop the vehicle in accordance with the traffic conditions.  
#
Check the tyres.  
* At least one tyre is overheating. The affected tyres are displayed in red. At temperatures close to the limit value,  
the tyres are displayed in yellow.  
Tyre(s) overheated  
&
WARNING Risk of an accident from driving with overheated tyres  
Overheated tyres can burst.  
#
Reduce speed so that the tyres cool down.  
* At least one tyre is overheating. The affected tyres are displayed in red. At temperatures close to the limit value,  
the tyres are displayed in yellow.  
Reduce speed  
&
WARNING Risk of an accident from driving with overheated tyres  
Overheated tyres can burst.  
#
Reduce speed so that the tyres cool down.  
494 Display messages and warning/indicator lamps  
Exhaust gas aftertreatment  
Display messages  
Possible causes/consequences and M Solutions  
The AdBlue® level has fallen into the reserve range.  
*
Top up AdBlue® immediately (/ page 174).  
#
Ø
Refill AdBlue See Owner’s  
Manual  
The low AdBlue® level will lead to limited performance after the remaining distance displayed has been covered.  
*
Top up AdBlue® immediately (/ page 174).  
#
Ø
Top up AdBlue Emergency  
op. in XXX miles See Own-  
er's Manual  
The low AdBlue® level will lead to limited performance from the speed displayed.  
*
After the remaining distance displayed has been covered, it will no longer be possible to start the engine.  
Ø
Add at least the amount of AdBlue® displayed (/ page 174).  
#
XX,X l Top up AdBlue Emer.  
op.: max. XXX km/h Start  
not poss. in XXX km  
Display messages and warning/indicator lamps 495  
Display messages  
Possible causes/consequences and M Solutions  
The AdBlue® tank is empty. You can no longer start the engine.  
*
Add at least the amount of AdBlue® displayed (/ page 174).  
Switch on the ignition and wait for approximately 60 seconds.  
#
Ø
#
XX,X l Top up AdBlue  
#
Start the engine.  
Switch on ignition, wait 60  
sec. or eng. start not poss.  
The AdBlue® system is malfunctioning.  
*
#
Consult a qualified specialist workshop immediately.  
¯
AdBlue system fault See  
Owner's Manual  
The AdBlue® system is malfunctioning. Performance will be reduced once the remaining distance displayed has  
been covered.  
*
¯
#
Consult a qualified specialist workshop immediately.  
AdBlue system fault Emer-  
gency op. in XXX km See  
Owner's Manual  
496 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
Power restriction due to the AdBlue® system fault. After the distance displayed has been covered, it will no longer  
be possible to start the engine.  
*
¯
#
Consult a qualified specialist workshop immediately.  
AdBlue system fault Emer.  
op.: max. XXX mph Start  
not poss. in XXX miles  
The AdBlue® system is malfunctioning. You can no longer start the engine.  
*
#
Consult a qualified specialist workshop immediately.  
¯
AdBlue system fault Engine  
start not possible  
Display messages and warning/indicator lamps 497  
Engine oil  
Display messages  
Possible causes/consequences and M Solutions  
* The engine oil level has dropped to the minimum level.  
5
NOTE Engine damage caused by driving with insufficient engine oil  
*
#
Check engine oil level  
when next refuelling  
Avoid long journeys with insufficient engine oil.  
#
Check the engine oil level when next refuelling.  
Top up the engine oil (/ page 376).  
Notes on engine oil (/ page 435).  
* Display message only for certain engines:  
The engine oil level has dropped to the minimum level.  
5
NOTE Engine damage caused by driving with insufficient engine oil  
*
Add 1 litre engine oil when  
next refuelling  
#
Avoid long journeys with insufficient engine oil.  
#
When next refuelling, add 1 litre of engine oil (/ page 376).  
Notes on engine oil (/ page 435).  
498 Display messages and warning/indicator lamps  
Display messages  
Possible causes/consequences and M Solutions  
* Display message only for certain engines:  
The engine oil level is too high.  
5
NOTE Engine damage caused by driving with excess engine oil  
*
Engine oil level Reduce oil  
level  
#
Avoid long journeys with excess engine oil.  
#
Consult a qualified specialist workshop immediately and have the engine oil level reduced.  
* Display message only for certain engines:  
The engine oil level is too low.  
5
NOTE Engine damage caused by driving with insufficient engine oil  
*
Engine oil level Stop vehi-  
cle Switch engine off  
#
Avoid long journeys with insufficient engine oil.  
#
#
#
#
Stop the vehicle immediately in accordance with the traffic conditions. Do not continue driving.  
Switch off the engine.  
Add 1 l of engine oil (/ page 376).  
Check the engine oil level.  
Notes on engine oil (/ page 435).  

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