2022 MERCEDES-BENZ C-CLASS SALOON Owners Manual

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
535

Warning/indicator lamp Possible causes/consequences and
P Solutions
Stop in a safe location immediately. Do not continue driving! 
Consult a qualiNed specialist workshop. &
WARNING Risk of an accident due t
o low brake Ouid level
If the brake Ouid le
vel is too low, the braking eMect and the braking characteristics may be impaired. 
Stop the vehicle as soon as possible, paying attention to road and tr
aPc conditions. Do not continue driving. 
Consult a q
ualiNed specialist workshop. 
Do not top up the brake Ouid.Driving systems
Warning/indicator lamp Possible causes/consequences and
P Solutions
/
W
arning lamp for distance
warning function * 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 t here is an additional warning tone, you are approaching an obstacle at too high a speed. 
Be prepared to brake immediately. 
Increase the distance.
Function of Active Brake Assist (  pag
e 253).536
Display messages and warning/indicator lamps

Warning/indicator lamp Possible causes/consequences and
P Solutions

Driving safety systems
Warning/indicator lamp Possible causes/consequences and
P Solutions
%
ABS w arning lamp * The yellow ABS warning lamp is lit while the vehicle is running.
ABS is malfunctioning.
If an additional w
arning tone sounds, EBD is malfunctioning.
Other driving systems and driving safety systems may also be malfunctioning. 
Note the messages on the driver's display. &
WARNING Ther
e is a risk of skidding if EBD or ABS is malfunctioning
The wheels may lock during braking.
The s
teerability and braking characteristics are heavily impaired and the braking distance may increase. In addition,
other driving safety systems are switched oM. 
Drive on carefully. 
Have the brake system checked immediately at a q
ualiNed specialist workshop.

Warning/indicator lamp Possible causes/consequences and
P Solutions

Warning/indicator lamp Possible causes/consequences and
P Solutions
If ESP n
canno t be activated, ESP n
is malfunctioning. 
Have ESP n
c
hecked immediately at a qualiNed specialist workshop. 
Observe the notes on deactivating ESP n
( pag
e 230).Mercedes-Benz emergency call system
Warning/indicator lamp Possible causes/consequences and
P Solutions
H
Mer
cedes-Benz emergency
call system warning lamp *The Mercedes-Benz emergency call system is malfunctioning. The Mercedes me connect system is also malfunctioning. 
Consult a qualiNed specialist workshop.540
Display messages and warning/indicator lamps

Tyre pressure monitor
Warning/indicator lamp Possible causes/consequences and
P Solutions
w
T yre pressure monitoring
system warning lamp Oashes*The yellow tyre pressure monitor warning lamp (pressure loss/malfunction)
Oashes f
or approximately one minute and
then remains lit.
The tyre pressure monitoring system is malfunctioning. &
WARNING Ther
e 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.
T
yres with insuPcient tyre pressure may impair the driving characteristics as well as steering and braking. 
Have the tyre pressure monitoring system checked at a q
ualiNed specialist workshop. w
T
yre pressure monitoring
system warning lamp lights
up * 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. &
WARNING Risk of an accident due t
o insuPcient tyre pressure
= The tyr
es 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. 
Observe the recommended tyre pressures. 
Adjust the tyre pressure if necessary. Display messages and warning/indicator lamps
541