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What to do if …
298
Brake
Problem Possible cause/consequence Suggested solutions
-
The yellow ABS indicator
lamp comes on while the
engine is running.
The ABS has detected a malfunc-
tion and switched off. The BAS
and ESP
®
are also switched off
(see messages in multifunction
display).
The brake system is still function-
ing normally but without the sys-
tems specified above available.
If the ABS control unit is malfunc-
tioning, other systems such as
the navigation system or the
automatic transmission may also
be malfunctioning.
X
Continue driving with added caution. Wheels may lock during hard
braking, reducing steering capability.
X
Read and observe messages that may appear in the multifunction
display (Y page 271).
X
Have the system checked at an authorized Mercedes-Benz Center
as soon as possible.
Failure to follow these instructions increases the risk of an accident.
-
The yellow ABS indicator
lamp comes on while the
engine is running.
The ABS has switched off due to
insufficient power supply.
The battery might not be charged
sufficiently.
When the voltage is above the required value again, the ABS is opera-
tional again and the ABS indicator lamp should go out.
X
If the ABS indicator lamp does not go out: Have the alternator and
the battery checked.
-
The yellow ABS indicator
lamp comes on while the
engine is running.
The self-diagnosis has not yet
been completed yet.
The indicator lamp will go out after driving a short distance at a vehicle
speed of above 12 mph (20 km/h).
Practical hints