2009 Mercedes CLS-Class Owner's Manual - Page 293

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. ESP®, EBP and PRE-SAFE® are X Read and observe messages that may appear in the multifunction also switched off (see messages display (Y page 255). in multifunction display). X Have the system checked at an authorized Mercedes-Benz Center The brake system is still functionas soon as possible. ing normally but without the systems specified above available. Failure to follow these instructions increases the risk of an accident. 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. You are driving with the parking brake engaged. X - The yellow ABS indicator lamp comes on while the engine is running. ; (USA only) 3 (Canada only) The red brake warning lamp comes on while driving and you hear a warning sound. Release the parking brake. Z 291