2003 Mercedes ML-Class Owner's Manual - Page 199

Operation Driving instructions Coolant temperature During severe operating conditions and stop-and-go city traffic, the coolant temperature may rise to approx. 248°F (120°C). The engine should not be operated with the coolant temperature in the red zone. Doing so may cause serious engine damage which is not covered by the Mercedes-Benz Limited Warranty. Warning! G 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. 199