2003 Mercedes C-Class Owner's Manual - Page 108

Controls in detail Instrument cluster Coolant temperature display Warning! i G Excessive coolant temperatures trigger a warning in the multifunction display. During severe operating conditions and stop-and-go city traffic, the coolant temperature may rise close to 248°F (120°C). The engine should not be operated with the coolant temperature above 248°F (120°C). Doing so may cause serious engine damage which is not covered by the Mercedes-Benz Limited Warranty. Driving when your engine is badly overheated can cause some fluids which may have leaked into the engine compartment to catch fire. You could be seriously burned. Steam from an overheated engine can cause serious burns and can occur just by opening the engine hood. Stay away from the engine if you see or hear steam coming from it. Turn off the engine, get out of the vehicle and do not stand near the vehicle until it cools down. Turn the SmartKey in the starter switch to position 1 or 2. Call up the trip odometer and main odometer by pressing button è or ÿ on the multifunction steering wheel ( page 112). Press button j or k until the coolant temperature display appears. 108