2023 Mercedes C Class 4 Door Display messages and warning/indicator lamps -> Warning and indicator lamps User Manual

MY CAR USER MANUAL

Display messages and warning/indicator lamps -> Warning and indicator lamps for Your Mercedes C Class 4 Door 2023

Display messages and warning/indicator lamps  
904  
Display messages  
Possible causes/consequences and M Solutions  
* Vehicles with a diesel engine: the engine oil quality is no longer sufficient.  
#
Visit a qualified specialist workshop and have the oil changed.  
5
Engine oil Quality loss Oil  
change required  
ü
Driver's display  
Seat belt (/ page 906)  
Warning and indicator lamps  
Overview of indicator and warning lamps  
p
Occupant presence reminder (white)  
(/ page 906)  
Some systems will perform a self-test when the  
vehicle is switched on. Some indicator and warn-  
ing lamps may briefly light up or flash. This behav-  
iour is non-critical. These indicator and warning  
lamps indicate a malfunction only if they light up  
or flash aꢀer the vehicle has been started or dur-  
ing a journey.  
p
Occupant presence reminder (yellow)  
(/ page 906)  
Drive system  
_
Ú
#
Reduced power (/ page 908)  
System error (/ page 908)  
Electrical fault (/ page 908)  
Vehicle  
ï
Indicator and warning lamps  
Occupant safety  
Trailer hitch (/ page 909)  
Ù
Power steering (yellow) (/ page 909)  
6
Restraint system (/ page 906)  
F206 0105 02  
Display messages and warning/indicator lamps  
Tyre pressure monitoring system  
905  
Ù
Ù
Power steering (red) (/ page 909)  
Driving and driving safety systems  
!
÷
å
å
¤
Æ
â
Û
ê
L
Ó
ê
Æ
ä
h
Tyre pressure monitoring system  
ABS (/ page 917)  
ESP® (/ page 917)  
ESP® OFF (/ page 917)  
ESP® OFF (/ page 917)  
Rear axle steering (yellow) (/ page 909)  
(/ page 924)  
Engine  
ÿ
;
p
Exterior lighting  
Coolant temperature (/ page 911)  
Engine diagnostics (/ page 911)  
T
Standing lights (/ page 220)  
Low beam (/ page 220)  
L
ESP® OFF (/ page 917)  
Vehicles with a petrol engine: engine oper-  
ating temperature (/ page 911)  
K
High beam (/ page 222)  
Turn signal lights (/ page 222)  
Rear fog light (/ page 220)  
ESP® SPORT (/ page 917)  
DRIFT MODE (/ page 917)  
ATTENTION ASSIST (/ page 917)  
Traffic Sign Assist (/ page 917)  
Distance warning (/ page 917)  
Active Brake Assist (/ page 917)  
Active Brake Assist (/ page 917)  
Active Brake Assist (/ page 917)  
Rear-axle level control (/ page 917)  
p
#!  
R
Engine operating temperature  
(/ page 911)  
%
#
8
Vehicles with a diesel engine: preglow  
Electrical fault (/ page 911)  
Symbols on the central display  
É
L
º
Drive Away Assist (/ page 411)  
Reserve fuel with fuel filler flap location  
indicator (/ page 911)  
Rear cross traffic warning (/ page 412)  
Manoeuvring brake function (/ page 413)  
Brakes  
!
Electric parking brake (yellow)  
(/ page 915)  
!
J
J
Electric parking brake (red) (/ page 915)  
Brakes (yellow) (/ page 915)  
Mercedes-Benz emergency call system  
H
Mercedes-Benz emergency call system  
(/ page 923)  
Brakes (red) (/ page 915)  
F206 0105 02  
Display messages and warning/indicator lamps  
906  
Occupant safety  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
* The restraint system red warning lamp is lit while the vehicle is on.  
The restraint system is malfunctioning (/ page 102).  
6
&
WARNING Risk of injury due to malfunctions in the restraint system  
Restraint system warning  
lamp  
Components in the restraint system may be activated unintentionally or not deploy as intended in an accident.  
#
Have the restraint system checked and repaired immediately at a qualified specialist workshop.  
Plug-in hybrid:  
&
DANGER Risk of fatal injuries due to restraint system malfunctions  
Components in the restraint system may be activated unintentionally or not deploy as planned in an accident. In the  
event of an accident, the high-voltage on-board electrical system may not be deactivated as intended.  
You may suffer an electric shock if you touch the damaged components of the high-voltage on-board electrical sys-  
tem.  
#
Have the restraint system checked and repaired immediately at a qualified specialist workshop.  
#
Aꢀer an accident, switch off the vehicle immediately.  
#
Drive on carefully.  
#
#
Note the messages on the driver's display.  
Consult a qualified specialist workshop immediately.  
F206 0105 02  
 
Display messages and warning/indicator lamps  
907  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
* The red seat belt warning lamp flashes and an intermittent warning tone sounds.  
The driver or front passenger has not fastened their seat belt while the vehicle is in motion.  
ü
#
Fasten your seat belt (/ page 102).  
There are objects on the front passenger seat.  
Seat belt warning lamp  
#
flashes  
Remove the objects from the front passenger seat.  
* The red seat belt warning lamp lights up once the vehicle has started.  
In addition, an intermittent warning tone may sound.  
ü
The red seat belt warning lamp reminds the driver and front passenger to fasten their seat belts.  
#
Seat belt warning lamp  
lights up  
Fasten your seat belt (/ page 102).  
If you have placed objects on the front passenger seat, the red seat belt warning lamp may remain lit.  
* The white occupant presence reminder warning lamp is lit.  
The occupant presence reminder is deactivated.  
p
Occupant presence  
reminder warning lamp  
(white)  
F206 0105 02  
Display messages and warning/indicator lamps  
908  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
* The yellow occupant presence reminder warning lamp is lit.  
The occupant presence reminder is malfunctioning  
p
#
Note the messages on the driver's display.  
Occupant presence  
reminder warning lamp (yel-  
low)  
Drive system  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
* The yellow reduced-power warning lamp is on.  
Drive system power output is reduced.  
_
#
Note the messages on the driver's display.  
Reduced-power warning  
lamp  
*The red system error warning lamp is lit while the vehicle is in a state of operational readiness õ.  
There is a malfunction in the drive system.  
Ú
#
Note the messages on the driver's display.  
System error warning lamp  
F206 0105 02  
 
Display messages and warning/indicator lamps  
909  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
* The red electrical fault warning lamp is lit.  
There is a fault with the electrics.  
#
#
Note the messages on the driver's display.  
Electrical fault warning lamp  
Vehicle  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
* The red trailer hitch warning lamp is lit.  
The trailer hitch is not operational.  
ï
&
WARNING Risk of an accident if the ball neck is not locked  
Trailer hitch warning lamp  
The trailer may become detached.  
#
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 swivelling procedure and do not re-couple the trailer until the display message disappears.  
#
#
#
Note the messages on the driver's display.  
F206 0105 02  
 
Display messages and warning/indicator lamps  
910  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
* The yellow power steering warning lamp is lit while the vehicle is running.  
The power assistance or the steering itself is malfunctioning.  
Ù
#
Note the messages on the driver's display.  
Power steering warning  
lamp (yellow)  
* The red power steering warning lamp is lit while the vehicle is running.  
The power assistance or the steering itself is malfunctioning.  
Ù
&
WARNING Risk of accident if steering capability is impaired  
Power steering warning  
lamp (red)  
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.  
#
Note the messages on the driver's display.  
* The yellow rear axle steering warning lamp is lit while the vehicle is running.  
The rear axle steering is malfunctioning.  
Ù
#
Note the messages on the driver's display.  
Rear axle steering warning  
lamp (yellow)  
F206 0105 02  
Display messages and warning/indicator lamps  
911  
Engine  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
* The red coolant warning lamp is lit while the engine is running.  
Possible causes:  
ÿ
R
The temperature sensor is malfunctioning  
Coolant warning lamp (red)  
R
The coolant level is too low  
R
The air supply to the radiator is obstructed  
R
The radiator fan is faulty  
R
The engine coolant pump is faulty  
If there is an additional warning tone, the coolant temperature has exceeded 120°C.  
&
WARNING Risk of burns when opening the bonnet  
If you open the bonnet in the event of an overheated engine or fire in the engine compartment, the following situa-  
tions may occur:  
R
You may come into contact with hot gases.  
R
You may come into contact with other escaping hot operating fluids.  
#
Before opening the bonnet, allow the engine to cool down.  
#
In the event of a fire in the engine compartment, keep the bonnet closed and call the fire service.  
#
Stop immediately in accordance with the traffic conditions and switch off the vehicle. Do not continue driving.  
F206 0105 02  
 
Display messages and warning/indicator lamps  
912  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
#
Note the messages on the driver's display.  
If the coolant temperature display is at the lower end of the temperature scale:  
#
Consult a qualified specialist workshop.  
If the coolant temperature display is at the upper end of the temperature scale:  
#
Exit the vehicle and keep a safe distance from it until the engine has cooled down.  
#
Check the coolant level (/ page 615).  
#
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 yellow coolant warning lamp is lit while the engine is running.  
Possible causes:  
ÿ
R
The temperature sensor is malfunctioning  
Coolant warning lamp (yel-  
low)  
R
The charge air, transmission oil or battery cooling is faulty  
R
The radiator shutters are blocked or defective  
#
Avoiding high loads on the engine, drive to the nearest qualified specialist workshop.  
F206 0105 02  
Display messages and warning/indicator lamps  
913  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
* The yellow engine diagnostics warning lamp is lit while the engine is running.  
A malfunction has occurred in the engine, the exhaust system or the fuel system.  
The emissions limit value may have been exceeded and the engine may be running in emergency operation mode.  
;
#
Engine diagnostics warning  
lamp  
Have the vehicle checked as soon as possible at a qualified specialist workshop.  
Vehicles with a diesel engine: the fuel tank may have been run dry.  
#
Start the engine three to four times aꢀer refuelling.  
If the yellow engine diagnosis warning lamp goes out, emergency operation mode is cancelled. The vehicle need not  
be checked.  
* The red electrical fault warning lamp is lit.  
There is a fault in the electrics.  
#
#
Note the messages on the driver's display.  
Electrical fault warning lamp  
*The blue warning lamp for engine operating temperature will remain lit until the engine operating temperature has been  
reached.  
p
The engine output and engine torque will remain reduced until then.  
#
Take this into consideration in your driving style.  
Engine operating tempera-  
ture warning lamp  
F206 0105 02  
Display messages and warning/indicator lamps  
914  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
*Vehicles with a petrol engine: aꢀer a cold start, the blue engine operating temperature warning lamp is on.  
Engine output and engine torque are reduced.  
p
#
Take this into consideration in your driving style.  
Engine operating tempera-  
ture warning lamp  
* The yellow fuel reserve warning lamp lights up while the engine is running.  
The fuel supply has dropped into the reserve range.  
8
#
Refuel.  
Fuel reserve warning lamp  
lights up  
F206 0105 02  
Display messages and warning/indicator lamps  
915  
Brakes  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
*The red electric parking brake indicator lamp flashes or is lit.  
The yellow electric parking brake indicator lamp is also lit in the event of a malfunction.  
!
#
Note the messages on the driver's display.  
Electric parking brake indi-  
cator lamp (red)  
!
Electric parking brake indi-  
cator lamp (yellow)  
* The yellow brakes warning lamp is lit while the vehicle is running.  
J
&
WARNING Risk of an accident due to a brake system malfunction  
If the brake system is malfunctioning, braking characteristics may be impaired.  
#
Brakes warning lamp (yel-  
low)  
Drive on carefully.  
#
Have the brake system checked immediately at a qualified specialist workshop.  
#
Adjust your speed and drive on carefully, leaving a suitable distance to the vehicle in front.  
If the driver's display shows a display message, observe it.  
#
F206 0105 02  
 
Display messages and warning/indicator lamps  
916  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
#
Consult a qualified specialist workshop.  
* The red brakes warning lamp is lit while the vehicle is running.  
Possible causes:  
J
R
The brake force boosting is malfunctioning and the braking characteristics may be affected.  
Brakes warning lamp (red)  
R
There is insufficient brake fluid in the brake fluid reservoir.  
#
Note the messages on the driver's display.  
&
WARNING Risk of accident and injury if brake force boosting is malfunctioning  
If brake force boosting is malfunctioning, increased brake pedal force may be necessary for braking. The braking  
characteristics may be impaired. The braking distance can increase in emergency braking situations.  
#
Stop in a safe location immediately. Do not continue driving!  
#
Consult a qualified specialist workshop.  
&
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.  
#
Stop the vehicle as soon as possible, paying attention to road and traffic conditions. Do not continue driving.  
#
Consult a qualified specialist workshop.  
#
Do not top up the brake fluid.  
F206 0105 02  
Display messages and warning/indicator lamps  
917  
Driving and driving safety systems  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
* The yellow ABS warning lamp is lit while the vehicle is running.  
ABS is malfunctioning.  
If an additional warning tone sounds, EBD is malfunctioning.  
!
ABS warning lamp  
Other driving systems and driving safety systems may also be malfunctioning.  
#
Note the messages on the driver's display.  
&
WARNING There is a risk of skidding if EBD or ABS is malfunctioning  
The wheels may lock during braking.  
The steerability and braking characteristics are heavily impaired and the braking distance may increase. In addition,  
other driving safety systems are switched off.  
#
Drive on carefully.  
#
Have the brake system checked immediately at a qualified specialist workshop.  
#
Drive on carefully.  
#
Consult a qualified specialist workshop.  
F206 0105 02  
 
Display messages and warning/indicator lamps  
918  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
The yellow ESP® warning lamp flashes while the vehicle is in motion.  
One or more wheels have reached their grip limit (/ page 337).  
*
÷
One or more wheels have reached their grip limit (/ page 338).  
ESP® warning lamp flashes  
#
Adapt your driving style to suit the road and weather conditions.  
The yellow ESP® warning lamp is lit while the vehicle is running.  
ESP® is malfunctioning.  
*
÷
Other driving systems and driving safety systems (e.g. BAS) may also be malfunctioning.  
ESP® warning lamp lights up  
#
Note the messages on the driver's display.  
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.  
#
#
Drive on carefully.  
#
Consult a qualified specialist workshop immediately.  
F206 0105 02  
Display messages and warning/indicator lamps  
919  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
The yellow ESP® OFF warning lamp is lit while the vehicle is running.  
ESP® is deactivated.  
*
å
Other driving systems and driving safety systems may also be inoperative.  
ESP® OFF warning lamp  
WARNING Risk of skidding when driving with ESP® deactivated  
&
ESP® does not act to stabilise the vehicle. The availability of further driving safety systems is also limited.  
#
Drive on carefully.  
Deactivate ESP® only for as long as the situation requires.  
#
If ESP® cannot be activated, ESP® is malfunctioning.  
Have ESP® checked immediately at a qualified specialist workshop.  
#
Observe the notes on deactivating ESP® (/ page 337).  
#
The yellow ESP® OFF warning lamps are lit while the vehicle is running.  
ESP® is deactivated.  
*
å
¤
Other driving systems and driving safety systems may also be inoperative.  
WARNING Risk of skidding when driving with ESP® deactivated  
&
ESP® does not act to stabilise the vehicle. The availability of further driving safety systems is also limited.  
F206 0105 02  
Display messages and warning/indicator lamps  
920  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
#
Drive on carefully.  
Deactivate ESP® only for as long as the situation requires.  
#
If ESP® cannot be activated, ESP® is malfunctioning.  
Have ESP® checked immediately at a qualified specialist workshop.  
#
Observe the notes on deactivating ESP® (/ page 338).  
#
ESP® SPORT is activated while the vehicle is running.  
*
When ESP® SPORT is activated, ESP® will stabilise the vehicle only to a limited extent.  
å
Æ
WARNING Risk of skidding if ESP® SPORT is used incorrectly  
&
When you activate ESP® SPORT, there is an increased risk of skidding and having an accident.  
#
Activate ESP® SPORT only in the circumstances described below.  
Observe the notes on activating ESP® SPORT(/ page 338).  
#
* The ATTENTION ASSIST warning lamp is lit.  
ATTENTION ASSIST is malfunctioning.  
Û
#
Consult a qualified specialist workshop.  
ATTENTION ASSIST warning  
lamp  
F206 0105 02  
Display messages and warning/indicator lamps  
921  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
* The Traffic Sign Assist warning lamp is lit.  
Traffic Sign Assist is malfunctioning.  
ê
#
Note the messages on the driver's display.  
Traffic Sign Assist warning  
lamp  
* The red distance warning lamp lights up while the vehicle is in motion.  
The distance to the vehicle in front is too small for the speed selected.  
If there is an additional warning tone, you are approaching an obstacle at too high a speed.  
L
#
Warning lamp for distance  
warning  
Be prepared to brake immediately.  
#
Increase the distance.  
Function of Active Brake Assist (/ page 364).  
* The Active Brake Assist warning lamp is on.  
Due to dirty sensors or a malfunction, the system is not available or the range of functions is restricted.  
Ó
#
Note the messages on the driver's display.  
Active Brake Assist warning  
lamp  
F206 0105 02  
Display messages and warning/indicator lamps  
922  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
* The Active Brake Assist warning lamp is on.  
The system is switched off or the range of functions has been automatically restricted.  
This may be the case if the driver is not wearing a seat belt or another driving system has been activated.  
ê
#
Active Brake Assist warning  
lamp  
Observe the notes on Active Brake Assist (/ page 364).  
* The Active Brake Assist warning lamp is on.  
Aꢀer you drive off, the system's range of functions will be restricted due to the teach-in process.  
Depending on the ambient conditions, the teach-in process may take a few minutes.  
Æ
#
Active Brake Assist warning  
lamp  
Observe the notes on Active Brake Assist (/ page 364).  
* The yellow AMG RIDE CONTROL warning lamp is lit.  
There is a fault in the AMG RIDE CONTROL.  
ä
#
Note the messages on the driver's display.  
Suspension warning lamp  
(yellow)  
* DRIFT MODE is activated while the engine is running.  
â
&
WARNING Risk of skidding and having an accident from wheels spinning  
DRIFT MODE warning lamp  
When you use DRIFT MODE, ESP® is not available.  
F206 0105 02  
Display messages and warning/indicator lamps  
923  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
There is an increased risk of skidding and having an accident.  
#
Do not use DRIFT MODE on normal roads.  
#
DRIFT MODE may only be activated and used on closed race circuits, not on public roads.  
Make sure that no persons or obstacles are in the close vicinity of your vehicle.  
#
#
Observe the notes on activating DRIFT MODE (/ page 388).  
* Plug-in hybrid:  
The yellow rear axle level control warning lamp is on.  
There is a fault with the rear axle level control.  
ä
#
Suspension warning lamp  
(yellow)  
Note the messages on the driver's display.  
Mercedes-Benz emergency call system  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
*The Mercedes-Benz emergency call system is malfunctioning. The Mercedes me connect system is also malfunctioning.  
#
Consult a qualified specialist workshop.  
H
Mercedes-Benz emergency  
call system warning lamp  
F206 0105 02  
 
Display messages and warning/indicator lamps  
924  
Tyre pressure monitor  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
*The yellow tyre pressure monitor warning lamp (pressure loss/malfunction) flashes for approximately one minute and  
then remains lit.  
h
The tyre pressure monitoring system is malfunctioning.  
Tyre pressure monitoring  
&
WARNING There is a risk of an accident if the tyre pressure monitoring system is malfunctioning  
system warning lamp flashes  
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.  
#
Consult a qualified specialist workshop.  
*The yellow tyre pressure monitoring system warning lamp (pressure loss/malfunction) is lit.  
The tyre pressure monitoring system has detected tyre pressure loss in at least one of the tyres.  
h
&
WARNING Risk of an accident due to insufficient tyre pressure  
Tyre pressure monitoring  
system warning lamp lights  
up  
R
R
R
The tyres can burst.  
The tyres can wear excessively and/or unevenly.  
The driving characteristics as well as the steering and braking may be greatly impaired.  
You could then lose control of the vehicle.  
F206 0105 02  
 
Display messages and warning/indicator lamps  
925  
Warning/indicator lamp  
Possible causes/consequences and M Solutions  
#
Observe the recommended tyre pressures.  
#
Adjust the tyre pressure if necessary.  
#
Stop the vehicle in accordance with the traffic conditions.  
#
Check the tyre pressure and the tyres.  
F206 0105 02  

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