Engine

Display messages Possible causes/consequences and Solutions Solutions
The coolant level is too low. The coolant level is too low.
Add coolant, observing the warning notes when doing so.
coolant system checked at a qualified specialist workshop. 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.

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 Solutions
The coolant is too hot. The coolant is too hot.
paying attention to road and traffic conditions. Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions.
e.g. by snow, slush or ice. Make sure that the air supply to the engine radiator is not blocked, e.g. by snow, slush or ice.
engine. Otherwise, there is a risk of engine damage. Wait until the display message disappears before restarting the engine. Otherwise, there is a risk of engine damage.
Pay attention to the coolant temperature display.
workshop immediately. If the temperature increases again, visit a qualified specialist workshop immediately.
The poly-V-belt may have torn.
paying attention to road and traffic conditions. Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions.
Open the hood.
torn: Check whether the poly-V-belt is torn.

If the poly-V-belt is torn:

Consult a qualified specialist workshop. Do not continue driving. The engine could otherwise overheat.

If the poly-V-belt is not damaged: Consult a qualified specialist workshop.

If the poly-V-belt is not damaged:

engine. Otherwise, there is a risk of engine damage. Wait until the display message disappears before restarting the engine. Otherwise, there is a risk of engine damage.
Pay attention to the coolant temperature display.
Visit a qualified specialist workshop.

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.

F(120 C) do not continue driving. 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 Solutions
The engine fan is defective. The engine fan is defective.
F (120 C ), drive to the next At coolant temperatures under 248 F (120 C ), drive to the next qualified specialist workshop.
mountainous terrain, and stop-and-go traffic. 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
paying attention to road and traffic conditions. Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions.
Open the hood.
torn: Check whether the poly-V-belt is torn.

If the poly-V-belt is torn:

Consult a qualified specialist workshop. Do not continue driving. The engine could otherwise overheat.

If the poly-V-belt is not damaged: Consult a qualified specialist workshop.

If the poly-V-belt is not damaged:

Visit a qualified specialist workshop.

Vehicles with an oil dipstick: the oil level has dropped to the Vehicles with an oil dipstick: the oil level has dropped to the minimum level.
Check the engine oil level at the latest when next refueling.
If necessary, add engine oil.
checked at a qualified specialist workshop. If engine oil needs to be added more often than usual, have the engine checked at a qualified specialist workshop.
Vehicles without an oil dipstick: the engine oil level is too low. Vehicles without an oil dipstick: the engine oil level is too low.
Check the oil level.
If necessary, add engine oil.
checked at a qualified specialist workshop. If engine oil needs to be added more often than usual, have the engine checked at a qualified specialist workshop.

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

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 Solutions
Vehicles without an oil dipstick: the engine oil level is too low. Vehicles without an oil dipstick: the engine oil level is too low.
There is a risk of engine damage.
paying attention to road and traffic conditions. Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions.
Apply the parking brake.
Add engine oil and check the oil level
Vehicles without an oil dipstick: you have added too much engine Vehicles without an oil dipstick: you have added too much engine oil. There is a risk of damage to the engine or to the catalytic converter.
Observe the legal requirements. Have the excess oil siphoned off at a qualified specialist workshop. Observe the legal requirements.
Vehicles without an oil dipstick: the measuring system is Vehicles without an oil dipstick: the measuring system is defective.
Visit a qualified specialist workshop.
The fuel level has dropped into the reserve range. The fuel level has dropped into the reserve range.
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.
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.
filler cap is not correctly closed: Check that the fuel filler cap is correctly closed.

If the fuel filler cap is not correctly closed:

If the fuel filler cap is correctly closed: Close the fuel filler cap.

If the fuel filler cap is correctly closed:

Visit a qualified specialist workshop.

Vehicles with a diesel engine: the fuel level has fallen below the Vehicles with a diesel engine: the fuel level has fallen below the reserve range.
Refuel at the nearest gas station.
DIESEL FUEL (ULSD, 15 ppm SULFUR MAXIMUM). Only use commercially available vehicular ULTRA-LOW SULFUR HIGHWAY DIESEL FUEL (ULSD, 15 ppm SULFUR MAXIMUM).
Vehicles with a diesel engine: the engine air filter is dirty and Vehicles with a diesel engine: the engine air filter is dirty and must be replaced.
Visit a qualified specialist workshop.
Vehicles with a diesel engine: there is water in the fuel filter. Vehicles with a diesel engine: there is water in the fuel filter. The water must be drained off.
Visit a qualified specialist workshop.
The DEF tank is empty. The DEF tank is empty.
workshop. Have the DEF tank filled as soon as possible at a qualified specialist workshop.
The DEF level has fallen to a minimum. The DEF level has fallen to a minimum.
workshop. Have the DEF tank filled immediately at a qualified specialist workshop.
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