2022 MERCEDES-BENZ C-CLASS ESTATE Owners Manual

Warning/indicator lamp Possible causes/consequences and
P Solutions

Warning/indicator lamp Possible causes/consequences and
P Solutions
=
Electr ical fault warning lamp * The red electrical fault warning lamp is lit.
There is a fault with the electrics. 
Note the messages on the driver's display. Vehicle
Warning/indicator lamp Possible causes/consequences and
P Solutions
ï
T
railer tow hitch warning
lamp * The red trailer hitch warning lamp is lit.
The trailer hitch is not operational. &
WARNING Risk of an accident if t
he ball neck is not locked
The trailer may become detached. 
Stop the vehicle immediately in accordance with the tr
aPc 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. Display messages and warning/indicator lamps
543

Warning/indicator lamp Possible causes/consequences and
P Solutions
Ù
P ower steering warning
lamp (yellow) * The yellow power steering warning lamp is lit while the vehicle is running.
The power assistance or the steering itself is malfunctioning. 
Note the messages on the driver's display.
Ù
P
ower steering warning
lamp (red) * The red power steering warning lamp is lit while the vehicle is running.
The power assistance or the steering itself is malfunctioning. &
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. 
Note the messages on the driver's display.
Ù
R
ear axle steering warning
lamp (yellow) * The yellow rear axle steering warning lamp is lit while the vehicle is running.
The rear axle steering is malfunctioning. 
Note the messages on the driver's display. 544
Display messages and warning/indicator lamps

Engine
Warning/indicator lamp Possible causes/consequences and
P Solutions

Warning/indicator lamp Possible causes/consequences and
P 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 qualiNed 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 (  pag
e 390). 
Make sure that the air supply to the radiator is not obstructed. 
Avoiding high loads on the engine, drive to the nearest q
ualiNed specialist workshop. In doing so, ensure that the
coolant temperature display remains below 120°C.

Warning/indicator lamp Possible causes/consequences and
P Solutions

Warning/indicator lamp Possible causes/consequences and
P Solutions

Warning/indicator lamp Possible causes/consequences and
P Solutions
M
Br ake system warning lamp
(yellow) * The yellow brake warning lamp is lit while the vehicle is running. &
WARNING Risk of an accident due t o a brake system malfunction
If the brake system is malfunctioning, braking characteristics may be impaired. 
Drive on carefully. 
Have the brake system checked immediately at a q
ualiNed 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. 
Consult a q
ualiNed specialist workshop.
M
Br
ake system warning lamp
(red) * The red brake warning lamp is lit while the vehicle is running.
Possible causes:
= The br
ake force boosting is malfunctioning and the braking characteristics may be aMected.
= There is insuPcient brake Ouid in the brake Ouid reservoir. 
Note the messages on the driver's display. &
WARNING Risk of accident and injur
y if brake force boosting is malfunctioning
If brake force boosting is malfunctioning, increased brake pedal force may be necessary for braking. The braking
c
haracteristics may be impaired. The braking distance can increase in emergency braking situations. Display messages and warning/indicator lamps
549