2007 Mercedes S-Class Owner's Manual - Page 545

Practical hints What to do if ...? Lamps in instrument cluster General information: If any of the following lamps in the instrument cluster fails to come on during the Possible cause/consequence The yellow Antilock Brake System (ABS) indicator lamp comes on while the engine is running. The ABS has detected a malfunction and has switched off. The BAS, ESP® and PRE-SAFE® are also switched off (see messages in multifunction display). The brake system is still functioning normally but without the ABS available. 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 557). Problem - Have the system checked at an authoIf the ABS control unit is malfunctioning, rized Mercedes-Benz Center as soon as other systems such as Parktronic*, DISpossible. TRONIC Plus*, navigation system, Park AsFailure to follow these instructions increassist* and the automatic transmission may es the risk of an accident. also be malfunctioning. The charging voltage has fallen below 10 volts. The ABS has switched off. When the voltage is above this value again, the ABS is operational again and the ABS inThe battery may not be charged sufficiently. dicator lamp should go out. If the ABS indicator lamp does not go out: Have the generator (alternator) and the battery checked. 544