Engine

Display messages Possible causes/consequences and Solutions
The coolant level is too low. The coolant level is too low.
warning notes when doing so. Add coolant, observing the warning notes when doing so.
added more often than usual, have the If coolant needs to be added more often than usual, have the engine coolant system checked at a qualified specialist workshop.

WARNING
Do not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol which may burn if it comes into contact with hot engine parts. You could be seriously burned.

Avoid making long journeys with too little coolant in the cooling The coolant level is too low. Avoid making long journeys with too little coolant in the cooling system. The engine will otherwise be damaged.
The display messages and the corresponding symbol that indicate that the coolant level is too low must not be ignored.

Display messages Possible causes/consequences and Solutions
The coolant is too hot. The coolant is too hot.
vehicle safely and switch off the engine, Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions.
supply to the engine radiator is not Make sure that the air supply to the engine radiator is not blocked, e.g. by snow, slush or ice.
message disappears before restarting the Wait until the display message disappears before restarting the engine. Otherwise, there is a risk of engine damage.
coolant temperature display. Pay attention to the coolant temperature display.
increases again, visit a qualified specialist If the temperature increases again, visit a qualified specialist workshop immediately.

WARNING
Driving when your engine is 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 which can occur just by opening the engine hood. Stay away from the engine if you see or hear steam coming from it.
Stop the vehicle in a safe location away from other traffic. Turn off the engine, get out of the vehicle and do not stand near the vehicle until the engine has cooled down.

exceeds 248 °F (120 °C) do not continue driving. The engine will If the coolant temperature exceeds 248 °F (120 °C) do not continue driving. The engine will otherwise be damaged.

Display messages Possible causes/consequences and Solutions
The engine fan is defective. The engine fan is defective.
under 248 °F (120 °C), drive to the next At coolant temperatures under 248 °F (120 °C), drive to the next qualified specialist workshop.
to heavy loads, e.g. driving in Avoid subjecting the engine to heavy loads, e.g. driving in mountainous terrain, and stop-and-go traffic.
The battery is not being charged. The battery is not being charged.
Possible causes are:
• a defective alternator
• a torn poly-V-belt
• a malfunction in the electronics
vehicle safely and switch off the engine, Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions.
Check whether the Open the hood.
poly-V-belt is torn. Check whether the poly-V-belt is torn.
If the poly-V-belt is torn:
The engine could otherwise overheat. Do not continue driving. The engine could otherwise overheat.
specialist workshop. Consult a qualified specialist workshop.
If the poly-V-belt is not damaged:
specialist workshop. Visit a qualified specialist workshop.
The oil level has dropped to the minimum level. The oil level has dropped to the minimum level.
A warning tone also sounds.
latest when next refueling. Check the oil level, at the latest when next refueling.
oil. If necessary, add engine oil.
a qualified specialist workshop if Have the engine checked at a qualified specialist workshop if engine oil needs to be added more often than usual.

Information on approved engine oils can be obtained from any qualified specialist workshop or on the Internet at http://www.mbusa.com (USA only).

long journeys with too little engine oil. There is a risk of The oil level is too low. Avoid long journeys with too little engine oil. There is a risk of engine damage.
The display messages and the corresponding symbol that indicate that the oil level is too low must not be ignored.

Display messages Possible causes/consequences and Solutions
The fuel level has dropped into the reserve range. The fuel level has dropped into the reserve range.
station. Refuel at the nearest gas station.
There is only a very small amount of fuel in the fuel tank. There is only a very small amount of fuel in the fuel tank.
station without fail. Refuel at the nearest gas station without fail.
The fuel system pressure is too low. The fuel filler cap is not The fuel system pressure is too low. The fuel filler cap is not closed correctly or the fuel system is leaking.
cap is correctly closed. Check that the fuel filler cap is correctly closed.
If the fuel filler cap is not correctly closed:
cap. Close the fuel filler cap.
If the fuel filler cap is correctly closed:
specialist workshop. Visit a qualified specialist workshop.
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