2005 Mercedes SL-Class Owner's Manual - Page 330

Practical hints What to do if ... Problem Possible cause (USA only) (Canada only) The yellow engine malfunction indicator lamp comes on while driving. Your fuel tank is empty. Suggested solution After refuelling, start, turn off, and restart the engine three or four times in succession. The limp-home mode is canceled. You do not need to have your vehicle checked. There is insufficient coolant in the reservoir. Immediately add coolant to prevent engine from overheating ( page 276). Have the cooling system checked. If the coolant temperature is below 248°F (120°C), you can continue driving to the nearest authorized Mercedes-Benz Center. Avoid high engine loads (e.g. driving uphill) and stop-and-go driving. ú ± D The red coolant warning lamp comes on when the engine is running. If this warning lamp comes on frequently, there is a leak in the cooling system. If the coolant level is correct, the electric radiator fan may be broken. D The red coolant warning lamp The coolant temperature has exceeded comes on while driving and you 248°F (120°C). hear a warning sound. Stop as soon as possible and allow the engine and coolant to cool down. 328