2009 Mercedes SL-Class Owner's Manual - Page 296

Practical hints What to do if ... Brake Problem - The yellow ABS indicator lamp comes on while the engine is running. Possible cause/consequence Suggested solutions The ABS has detected a malfunc- X Continue driving with added caution. Wheels may lock during hard tion and switched off. The BAS, braking, reducing steering capability. the ESP® and the hill start assist X Read and observe messages that may appear in the multifunction system (SL 63 AMG only) are also display (Y page 255). switched off (see messages in X Have the system checked at an authorized Mercedes-Benz Center multifunction display). as soon as possible. The electro-hydraulic brake system is still functioning normally Failure to follow these instructions increases the risk of an accident. but without the systems specified above available. If the ABS control unit is malfunctioning, other systems such as the navigation system or the automatic transmission may also be malfunctioning. The ABS has switched off due to When the voltage is above the required value again, the ABS is operainsufficient power supply. tional again and the ABS indicator lamp should go out. The battery might not be charged X If the ABS indicator lamp does not go out: Have the alternator and sufficiently. the battery checked. - The yellow ABS indicator lamp comes on while the engine is running. 294