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Practical hints
What to do if ...
Lamps in instrument cluster
Problem
-
The yellow ABS indicator lamp
comes on while the engine is
running.
322
General information:
If any of the following lamps in the instru-
ment cluster fails to come on during the
Possible cause/consequence
The ABS has detected a malfunction and
has switched off. The BAS and the ESP
are also switched off (see messages in the
multifunction display).
The brake system is still functioning nor-
mally but without the systems specified
above.
If the ABS control unit is malfunctioning,
other systems such as the navigation
system* or the automatic transmission
may also be malfunctioning.
The charging voltage has fallen below
10 volts. The ABS has switched off.
The battery might not be charged suffi-
ciently.
bulb self-check when switching on the
ignition, have the respective bulb checked
and replaced if necessary.
Suggested solution
Continue driving with added caution.
®
Wheels may lock during hard braking,
reducing steering capability.
Read and observe messages in the
multifunction display ( page 333).
Have the system checked at an autho-
rized Mercedes-Benz Center as soon as
possible.
Failure to follow these instructions
increases the risk of an accident.
Switch off electrical consumers that are
currently not needed, e.g. seat heating*.
If necessary, have the generator and bat-
tery checked.
When the voltage is above this value again,
the ABS is operational again.
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