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Practical hints
What to do if …?
Problem Possible cause/consequence Suggested solution
- The yellow Antilock
Brake System (ABS)
indicator lamp comes on
while the engine is
running.
The charging voltage has fallen below
10 volts. The ABS has switched off. The
BAS, ESP
®
and EBP are also switched off
(see messages in the multifunction display)
The battery may not be charged sufficiently.
̈ Switch off electrical consumers that are
currently not needed, e.g. seat heat-
ing*.
̈ If necessary, have the generator and
battery checked.
When the voltage is above this value again,
the ABS is operational again and the ABS in-
dicator lamp should go out.
- The yellow ABS indicator
lamp comes on while the
engine is running.
The ABS is temporarily not available. The
ESP
®
, BAS and EBP are also unavailable.
The system’s self-diagnosis may not be
completed yet.
The brake system is still functioning nor-
mally but without the systems specified
above.
̈ Drive a short distance with added
caution at a vehicle speed of above
12 mph (20 km/h).
When the ABS indicator lamp goes out,
the ABS, ESP
®
, BAS and EBP are avail-
able again.
If the ABS indicator lamp does not go out:
̈ Continue driving with added caution.
̈ Have the system checked at an autho-
rized Mercedes-Benz Center as soon as
possible.
Failure to follow these instructions increas-
es the risk of an accident.