2005 Mercedes C-Class Owner's Manual - Page 304

Practical hints What to do if ... Lamps in instrument cluster General information: If a bulb in the instrument cluster fails to come on during the bulb self-check when Possible cause The yellow ABS malfunction 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 brake system is still functioning normally but without the ABS available. switching on ignition, have it checked and replaced if necessary. Problem Suggested solution Continue driving with added caution. Wheels may lock during hard braking, reducing steering capability. Read and observe messages in the display ( page 309). - If the ABS control unit is malfunctioning, Have the system checked at an authoother systems such as the navigation rized Mercedes-Benz Center as soon system* or the automatic transmission* may as possible. also be malfunctioning. Failure to follow these instructions increases the risk of an accident. The charging voltage has fallen below ten volts. The ABS has switched off. The battery might not be charged sufficiently. Switch off electrical consumers that are currently not needed, e.g. seat heating*. If necessary, have the generator (alternator) and battery checked. When the voltage is above this value again, the ABS is operational again. 302