2009 Mercedes CLK-Class Owner's Manual - Page 312

Practical hints What to do if ... Problem - The yellow ABS indicator lamp comes on while the engine is running. Possible cause/consequence The ABS is temporarily not available. The ESP® and the BAS are also unavailable. The self-diagnosis has not been completed yet. The brake system is still functioning normally but without the systems specified above. You are driving with the parking brake engaged. Suggested solutions The indicator lamp will go out after driving a short distance at a vehicle speed of above 12 mph (20 km/h). If the ABS indicator lamp does not go out: X Continue driving with added caution. X Have the system checked at an authorized Mercedes-Benz Center as soon as possible. Failure to follow these instructions increases the risk of an accident. X ; (USA only) 3 (Canada only) The red brake warning lamp comes on while driving and an acoustic warning sounds. ; (USA only) 3 (Canada only) The red brake warning lamp comes on while the engine is running. Release the parking brake. There is insufficient brake fluid in the reservoir. X Risk of accident! Do not drive any further. Stop the vehicle in a safe location as soon as it is safe to do so. X Engage the parking brake. X Read and observe messages that may appear in the multifunction display (Y page 279). X Contact an authorized Mercedes-Benz Center. Do not add brake fluid! This will not solve the problem. G Warning! Driving with the brake warning lamp illuminated can result in an accident. Have your brake system checked immediately if the brake warning lamp stays on. Do not add brake fluid before checking the brake system. 310