MERCEDES-BENZ C CLASS COUPE 2023 Owners Manual

Mercedes-Benz emergency call systemDisplay messagesPossible causes/consequences and P Solutions
S
Inoperative
*The Mercedes-Benz emergency call system is malfunctioning. The Mercedes me connect system is also malfunction-
ing.Consult a qualiNed specialist workshop.BatteryDisplay messagesPossible causes/consequences and P SolutionsCannot Start Vehicle See
Operator's Manual*The vehicle cannot be started.Switch the vehicle oM and switch it back on.If the display message still appears, consult a qualiNed specialist workshop.*Vehicles with 48 V on-board electrical system: the state of charge of the 48 V battery is too low. You can no longer
start the vehicle.Switch oM electrical consumers that are not required.Connect a suitable charger approved for Mercedes-Benz with suPcient charge output to the jump-start connection
point of the 12 V battery (  page 329).
The 48 V battery is charged via the voltage converter in the vehicle.Display messages and warning/indicator lamps429

Display messagesPossible causes/consequences and P Solutions
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12 V On-board Electrical
System Service Required
*The 12 V on-board electrical system is malfunctioning.Consult a qualiNed specialist workshop immediately.
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Stop Vehicle See Opera-
tor's Manual
*The 12 V battery is no longer being charged and the condition of charge is too low.*NOTE Possible engine damage if you continue drivingDo not continue driving under any circumstances.Consult a qualiNed specialist workshop.Stop the vehicle immediately in accordance with the traPc conditions. Do not continue driving.Switch oM the vehicle.Consult a qualiNed specialist workshop.
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Switch on vehicle to charge the 12 V battery
*The vehicle is oM and the condition of charge of the 12 V battery is too low.Switch oM electrical consumers that are not required.Drive for 30!

Display messagesPossible causes/consequences and P Solutions
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Stop Vehicle To Charge the
12 V Battery Do Not
Switch Off Vehicle
*The 12 V battery condition of charge is too low.Stop the vehicle immediately in accordance with the traPc conditions. Do not continue driving.Leave the vehicle runningIf the display message disappears: drive on.If the display message does not disappear: consult a qualiNed specialist workshop.

Display messagesPossible causes/consequences and P Solutions

Display messagesPossible causes/consequences and P SolutionsConnect a suitable charger approved for Mercedes-Benz with suPcient charge output to the jump-start connection
point of the 12 V battery (  page 329).
The 48 V battery is charged via the voltage converter in the vehicle.Starting Possible Again*The 48 V battery has been charged automatically via the voltage converter.Start the vehicle and drive for a while to charge the 12 V battery and the 48 V battery.Tire pressure monitorDisplay messagesPossible causes/consequences and P SolutionsTire Pressure Monitor Cur-
rently Unavailable*There is interference from a powerful radio signal source As a result, no signals from the tire pressure sensor are
being received. The tire pressure monitoring system is temporarily unavailable.
The tire pressure monitoring system will restart automatically as soon as the cause has been rectiNed.Drive onTire Pressure Monitor Inop-
erative*The tire pressure monitoring system is malfunctioning.&WARNING There is a risk of an accident if the tire pressure monitoring system is malfunctioning
The tire pressure monitoring system cannot issue a warning if there is pressure loss in one or more of the tires.
Tires with insuPcient tire pressure may impair the driving characteristics as well as steering and braking.
Have the tire pressure monitoring system checked at a qualiNed specialist workshop.Display messages and warning/indicator lamps433

Display messagesPossible causes/consequences and P SolutionsTire Pressure Monitor Inop-
erative Tire Pressure Sen-
sors Missing*The wheels installed do not have suitable tire pressure sensors. The tire pressure monitoring system is deactivated.Install wheels with suitable tire pressure sensors.
é
Wheel Sensor(syf Missing
*There is no signal from the tire pressure sensor in at least one wheel. No pressure value is displayed for the aMected
tire.Have the faulty tire pressure sensor replaced at a qualiNed specialist workshop.
é
Check Tires
*The tire pressure in one or more tires has dropped signiNcantly.
The wheel position is displayed. A warning tone also sounds.&WARNING Risk of an accident due to insuPcient tire pressure
=
The tires can burst.
= The tires 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.
Observe the recommended tire pressures.Adjust the tire pressure if necessary.Stop the vehicle in accordance with the traPc conditions.434Display messages and warning/indicator lamps

Display messagesPossible causes/consequences and P SolutionsCheck the tire pressure (  page 340) and the tires.
é
Please Correct Tire Pres-
sure
*The tire pressure is too low in at least one of the tires, or the diMerence in tire pressure between the individual wheels
is too great.Check the tire pressure and add air, if necessary.When the tire pressure is correct, restart the tire pressure monitor (  page 345).
é
Warning Tire Malfunction
*The pressure in one or more tires has dropped suddenly. The wheel position is displayed.&WARNING Risk of an accident from driving with a Oat tire
=
The tires can overheat and be damaged.
= The driving characteristics as well as the steering and braking characteristics may be greatly impaired.
You could then lose control of the vehicle.
Do not drive with a Oat tire.Do not exceed the maximum permissible driving distance in emergency mode and the maximum permissible
speed with a Oat MOExtended tire.Observe the notes on Oat tires.
Notes on Oat tires (  page 318).
Stop the vehicle in accordance with the traPc conditions.Display messages and warning/indicator lamps435

Display messagesPossible causes/consequences and P SolutionsCheck the tires.
é
Tires Overheated
*At least one tire is overheating. The aMected tires are displayed in red. At temperatures close to the limit value, the
tires are displayed in yellow.&WARNING Risk of an accident from driving with overheated tires
Overheated tires can burst.
Reduce speed so that the tires cool down.
é
Reduce Speed
*At least one tire is overheating. The aMected tires are displayed in red. At temperatures close to the limit value, the
tires are displayed in yellow.&WARNING Risk of an accident from driving with overheated tires
Overheated tires can burst.
Reduce speed so that the tires cool down.Tire pressure loss warning systemDisplay messagesPossible causes/consequences and P SolutionsCheck Tire and Tire Pres-
sure*Canada only:
The tire pressure loss warning system has detected a signiNcant loss of pressure.436Display messages and warning/indicator lamps

Display messagesPossible causes/consequences and P Solutions&WARNING Risk of an accident due to insuPcient tire pressure
=
The tires can burst.
= The tires 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.
Observe the recommended tire pressures.Adjust the tire pressure if necessary.Stop the vehicle in accordance with the traPc conditions.Check the tire pressure (  page 340) and the tires.When the tire pressure is correct, restart the tire pressure loss warning system (  page 346).Check Tire Pressure Then
Restart Run Flat Indicator*Canada only:
The tire pressure loss warning system generated a display message and has not been restarted since.When the tire pressure is correct, restart the tire pressure loss warning system (  page 346).Tire Pressure Monitor Inop-
erative*Canada only:
The tire pressure loss warning system is malfunctioning.Visit a qualiNed specialist workshop.Display messages and warning/indicator lamps437

Engine oilDisplay messagesPossible causes/consequences and P Solutions