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Practical hints
What to do if …
Problem Possible cause/consequence Suggested solution
- The yellow 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 display).
The electro-hydraulic brake system is still
functioning normally but without ABS avail-
able.
If the ABS control unit is malfunctioning, oth-
er systems such as Parktronic*, Distronic*,
or the automatic transmission may also be
malfunctioning.
̈ Continue driving with added caution.
Wheels may lock during hard braking,
reducing steering capability.
̈ Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
Failure to follow these instructions in-
creases the risk of an accident.
̈ Read and observe messages in the
display (
୴ page 347).
The charging voltage has fallen below
10 volts and the ABS was switched off.
The battery may not be sufficiently charged.
̈ Switch off electrical consumers that
are currently not needed, e.g. seat
heating.
̈ If necessary, have the generator and
battery checked.
When the voltage is above this value
again, the ABS is operational again.