Mercedes-Benz GL-Class: Engine - Display messages - On-board computer and displays - Mercedes-Benz GL-Class Owner's ManualMercedes-Benz GL-Class: Engine

Display messages

Operator's Manual  Top Up Coolant See Operator's Manual

Possible causes/consequences and Solutions

The coolant level is too low.
Add coolant, observing the warning notes when doing so.
If the coolant needs to be refilled 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 
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

 switch engine off  Coolant Stop car, switch engine off

Possible causes/consequences and Solutions

The coolant is too hot.
Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions.
Make sure that the air supply to the engine radiator is not blocked, e.g. by snow, slush or ice.
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.
If the temperature increases again, visit a qualified specialist workshop immediately.

The poly-V-belt may have torn.
Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions.
Open the hood.
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.
Consult a qualified specialist workshop.

If the poly-V-belt is OK:

  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 
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.

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 ►

Possible causes/consequences and Solutions

The engine fan is defective.
At coolant temperatures under 248 °F (120 °C), drive to the next qualified specialist workshop.
Avoid subjecting the engine to heavy loads, e.g. driving in mountainous terrain, and stop-and-go traffic.

Display messages

 Possible causes/consequences and ►

Possible causes/consequences and Solutions

The battery is not being charged.
Possible causes are:
a defective alternator
a torn poly-V-belt
a malfunction in the electronics
Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions.
Open the hood.
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.
Consult a qualified specialist workshop.

If the poly-V-belt is OK:

Visit a qualified specialist workshop.

Display messages

 Vehicle Battery / Alternator Stop Vehicle

Possible causes/consequences and Solutions

The battery is defective.
Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions. Do not continue driving under any circumstances.
Engage the parking brake.
Consult a qualified specialist workshop.

Display messages

 next refueling Check engine oil level at next refueling

Possible causes/consequences and Solutions

The oil level is too low.
Check the oil level.
If necessary, add engine oil.
Have the engine checked for leaks if the engine oil needs to be refilled 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).

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 ► Reserve Fuel

Possible causes/consequences and Solutions

The fuel level has dropped into the reserve range.
Refuel at the nearest gas station.

Display messages

 Possible causes/consequences and ►

Possible causes/consequences and Solutions

The fuel level has dropped into the reserve range.
Refuel at the nearest gas station.

Display messages

Possible causes/consequences and ►  Gas Cap Open

Possible causes/consequences and Solutions

The fuel system pressure is too low. The fuel filler cap is not closed correctly or the fuel system is leaking.

Check that the fuel filler cap is correctly closed.

If the fuel filler cap is not correctly closed:

Close the fuel filler cap.

If the fuel filler cap is correctly closed:

Visit a qualified specialist workshop.

Display messages

 Diesel Fuel Only Ultra Low-sulfur Diesel Fuel Only

Possible causes/consequences and Solutions

Vehicles with a diesel engine: the fuel level has fallen below the reserve range.
Refuel at the nearest gas station.
Only use commercially available vehicular ULTRA-LOW SULFUR HIGHWAY DIESEL FUEL (ULSD, 15 ppm SULFUR MAXIMUM).

Display messages

 Possible causes/consequences and ► Replace air filter

Possible causes/consequences and Solutions

Vehicles with a diesel engine: the engine air filter is dirty and must be replaced.
Visit a qualified specialist workshop.

Display messages

 Possible causes/consequences and ► Clean Fuel Filter

Possible causes/consequences and Solutions

Vehicles with a diesel engine: there is water in the fuel filter. The water must be drained off.
Visit a qualified specialist workshop.

Display messages

 Operator's Manual Check Additive See Operator's Manual

Possible causes/consequences and Solutions

The DEF tank is empty.
Have the DEF tank filled as soon as possible at a qualified specialist workshop.

Display messages

 Possible causes/consequences and ► Remaining Starts:

Possible causes/consequences and Solutions

The DEF level has fallen to a minimum.
Have the DEF tank filled immediately at a qualified specialist workshop.

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