2006 Mercedes SL-Class Owner's Manual - Page 335

Practical hints What to do if ... Problem Possible cause/consequence (USA only) (Canada only) The red brake warning lamp comes on while driving and you hear a warning sound. You are driving with the parking brake set. Suggested solution Release the parking brake ( page 51). ; 3 ; 3 (USA only) (Canada only) The red brake warning lamp comes on when the engine is running and you hear a warning sound. There is a malfunction in the electro-hydraulic brake system. There is insufficient brake fluid in the reservoir. Read and observe messages in the display ( page 345). Risk of accident! Carefully stop the vehicle in a safe location or as soon as it is safe to do so and notify an authorized Mercedes-Benz Center. Do not add brake fluid! This will not solve the problem. Warning! G 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. Overfilling the brake fluid reservoir can result in spilling brake fluid on hot engine parts and the brake fluid catching fire. You can be seriously burned. ! If you find that the brake fluid in the brake fluid reservoir has fallen to the minimum mark or below, have the brake system checked for brake pad thickness and leaks. 334