MERCEDES-BENZ C-CLASS SALOON 2022 Owners Manual

Display messages
Possible causes/consequences and P Solutions 
Aser waiting for a short time, unlock the vehicle and start it again. 
If the display message appears again and the vehicle does not start, consult a q
ualiNed specialist workshop.
Drive malfunction Achieva-
ble speed limited Stop soon * The drive system is malfunctioning.
The maximum v
ehicle speed is restricted. The drive system will shut oM within a few kilometres. 
Stop the vehicle immediately in accordance with the tr
aPc conditions and switch oM the drive system. Do not con-
tinue driving. 
Do not tow the vehicle, stop towing if necessary. 
Consult a q
ualiNed specialist workshop.
Drive malfunction Achieva-
ble speed severely limited
See Owner's Manual * The drive system is malfunctioning.
The maximum v
ehicle speed is restricted. 
Consult a q
ualiNed specialist workshop.

Display messages
Possible causes/consequences and P Solutions

Display messages
Possible causes/consequences and P Solutions
High-voltage battery mal-
function. No start in
approx. XXX km
Consult
workshop(red display mes-
sage) * A malfunction has occurred in the high-voltage battery.
It will no long er be possible to start the electric drive system aser the distance displayed has been covered.
It is still possible to start the combustion engine. 
Have the necessary maintenance work on the high-voltage battery carried out immediately at a q
ualiNed specialist
workshop.
High-voltage battery mal-
function. Consult work-
shop without starting the
vehicle again * A malfunction has occurred in the high-voltage battery.
It will no long
er be possible to restart the drive system once it has been switched oM.
Do not switch oM t
he drive system; drive on to the nearest qualiNed specialist workshop.
6 Please wait Depressurising
fuel tank *
Vehicles with petrol engines: t
he pressure in the fuel tank is reduced before the fuel Nller Oap is opened. The pressure
reduction can take up to 15 minutes.
6 Fuel tank is depressurised
Ready for refuelling *
Vehicles with petrol engines: t
he pressure in the fuel tank is released and the fuel Nller Oap opens. 470
Display messages and warning/indicator lamps

Vehicle
Display messages
Possible causes/consequences and P Solutions * The driver's display is inoperative due to a failed
sosw are update.
The display message will be shown every time the engine is started. &
WARNING Risk of accident if t
he driver display fails
If the driver display has failed or is malfunctioning, function restrictions in systems relevant to safety cannot be
de
tected.
The operating safety of your vehicle may be impaired. 
Drive on carefully. 
Have the vehicle checked immediately at a q
ualiNed specialist workshop. If the operating safety of your vehicle is impaired, park the vehicle immediately and safely. Contact a
q
ualiNed special-
ist workshop. &
WARNING Risk of accident due t
o failure of the driver display
In the event that the driver display fails or malfunctions, you will not recognise function restrictions aMecting sy
s-
tems relevant to safety. This may impair operating safety. 
Park the vehicle safely as soon as possible and notify a q
ualiNed specialist workshop. Display messages and warning/indicator lamps
471

Display messages
Possible causes/consequences and P Solutions
If the driver's display fails, you may not recognise function restrictions aMecting sy stems relevant to safety or the
speed display, for example. The operating safety of the vehicle may be impaired ( page 329). 
Have the vehicle checked by a q
ualiNed specialist workshop immediately.
r
Vehicle is operational
Switch off vehicle before
exiting * You are leaving the vehicle in a ready-to-drive state. 
Get out of the vehicle, secure it against rolling away and take the key with you. 
If you do not leave the vehicle, switch oM t
he electrical consumers, e.g. the seat heating. Otherwise, the 12!

Display messages
Possible causes/consequences and P Solutions
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 nec k. 
Consult a q
ualiNed specialist workshop.
* When the vehicle is stationary with a coupled trailer, the trailer hitch is not operational. 
Uncouple the coupled trailer and secure it against rolling away. 
If the ball neck has been folded in: unloc
k the ball neck ( page 295). 
Swivel the ball neck into the end position manually and let it engage. 
If the ball neck has been folded out: unloc
k the ball neck ( page 295). 
Swivel the ball neck beneath the bumper manually and let it engage.
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 nec
k. 
Consult a q
ualiNed specialist workshop.
Head-up display currently
unavailable See Owner's
Manual * The head-up display is temporarily unavailable. Possible causes:
= malfunctions in t

he power supply
= signal interference 
Stop in accordance with the tr
aPc conditions and switch the vehicle oM and on again. Display messages and warning/indicator lamps
473

Display messages
Possible causes/consequences and P Solutions 
If the display message still appears, consult a q ualiNed specialist workshop.
Head-up display inoperative * The head-up display has an internal error. 
Consult a q
ualiNed specialist workshop.
Head-up display Brightness
currently reduced See Own-
er's Manual * The brightness of the head-up display is reduced. Possible causes:
= Dir

t on the windscreen in the camera's Neld of vision
= Faulty exterior brightness signals 
Switch on the windscreen wipers. 
Clean the windscreen if necessary. 
Switch the vehicle oM and switc
h it back on 
If the display message still appears, consult a q
ualiNed specialist workshop.
Ù
Steering malfunction Drive
carefully Visit workshop * A power steering malfunction has occurred. Steering characteristics may be impaired as a result. 
Drive on carefully. 
Consult a q
ualiNed specialist workshop.474
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and P Solutions
Ù
Steering malfunction
Increased physical effort
See Owner's Manual * The power steering assistance is malfunctioning. &
WARNING Risk of an accident due t o altered steering characteristics
If the power assistance of the steering fails partially or completely, you will need to use more force to steer. 
If safe steering is possible, drive on carefully. 
Visit or consult a q
ualiNed specialist workshop immediately. Ù
Steering malfunction Stop
immediately See Owner's
Manual * The steering is malfunctioning. Steering capability is
signiNcantl
y impaired. &
WARNING Risk of accident if s
teering capability is impaired
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 tr
aPc conditions. Do
not continue driving under any circumstances. 
Consult a q
ualiNed specialist workshop. Ù
Rear axle steering cur-
rently malfunctioning * The rear-axle steering is temporarily unavailable. The turning circle may become wider. 
Stop the vehicle in accordance with the tr
aPc conditions and restart the vehicle.
If the display message does not disappear: 
Drive on carefully. 
Consult a q
ualiNed specialist workshop. Display messages and warning/indicator lamps
475

Display messages
Possible causes/consequences and P Solutions
Ù
Rear axle steering Malfunc-
tion Visit workshop * The rear axle steering is malfunctioning.
The r ear axle has no steering capability.
The steering wheel may be at an angle when you drive in a straight line. 
Adapt your speed and drive on carefully. 
Consult a q
ualiNed specialist workshop immediately.
Ù
Rear axle steering Malfunc-
tion Stop immediately * The rear axle steering is malfunctioning.
The r
ear axle has no steering capability.
The steering wheel may be tilted when you drive in a straight line. &
WARNING Risk of accident if s
teering capability is impaired
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 tr
aPc conditions. Do
not continue driving under any circumstances. 
Consult a q
ualiNed specialist workshop.Active bonnet malfunction
See Owner's Manual
* The active bonnet (pedestrian protection) is malfunctioning or inoperative
aser ha
ving already been triggered.
Consult a q
ualiNed specialist workshop.
Ambient light warning sup-
port inoperative * The ambient lighting may not provide full visual warning support. 
Lock the vehicle and unlock it again aser a f
ew minutes.476
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and P Solutions 
If the display message appears regularly, contact a q ualiNed specialist workshop.
Q * At least one door is open. 
Close all doors.
M * The bonnet is open. &
WARNING Risk of accident due t
o 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 in accordance with the tr
aPc conditions. 
Close the bonnet.
N * The boot lid is open. &
DANGER Risk of e
xhaust gas poisoning
Combustion engines emit poisonous exhaust gases such as carbon monoxide. Exhaust gases can enter the vehicle
int
erior if the boot lid is open when the engine is running, especially if the vehicle is in motion. 
Always switch oM t
he engine before opening the boot lid. Display messages and warning/indicator lamps
477