340
Practical hints
What to do if …?
Lamps in instrument cluster
General information:
If any of the following lamps in the instru-
ment cluster fails to come on during the
bulb self-check when switching on the
ignition, have the respective bulb checked
and replaced if necessary.
Problem Possible cause Suggested solution
- The yellow Antilock Brake
System (ABS) indicator lamp
comes on while driving.
The ABS has detected a malfunction and
has switched off. The BAS and the ESP are
also switched off (see messages in multi-
function display).
The brake system is still functioning nor-
mally but without the ABS available.
If the ABS control unit is malfunctioning,
other systems such as Parktronic*,
Distronic*, and the automatic transmission
may also be malfunctioning.
왘 Continue driving with added caution.
Wheels may lock during hard braking,
reducing steering capability.
왘 Read and observe messages in the mul-
tifunction display (
컄 page 353).
왘 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.
The charging voltage has fallen below
10 volts and the ABS has switched off.
The battery may not be charged sufficiently.
왘 Switch off electrical consumers that are
currently not needed, e.g. seat heat-
ing*.
왘 If necessary, have the generator
(alternator) and battery checked.
When the voltage is above this value again,
the ABS is operational again.
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