Mercedes-Benz GL-Class: Important safety notes - Refueling - Driving and parking - Mercedes-Benz GL-Class Owner's ManualMercedes-Benz GL-Class: Important safety notes

WARNING Gasoline and diesel fuels are highly flammable 
Gasoline and diesel fuels are highly flammable and poisonous. They burn violently and can cause serious injury.
Never allow sparks, flames or smoking materials near gasoline or diesel fuelTurn off the engine before refueling. Turn off the engine before refueling.
Whenever you are around gasoline or diesel fuel, avoid inhaling fumes and any skin or clothing contact. Extinguish all smoking materials.
Direct skin contact with fuels and the inhalation of fuel vapors are damaging your health.

WARNING Overfilling of the fuel tank may create 
Overfilling of the fuel tank may create pressure in the system which could cause a gas discharge. This could cause the gasoline to spray back out when removing the fuel pump nozzle, which could cause personal injury.

WARNING Do not fill diesel tanks with gasoline. Do not 
Do not fill diesel tanks with gasoline. Do not mix diesel fuel with gasoline. Otherwise the fuel system and engine could be damaged. In addition, the vehicle could catch fire.

a diesel engine. Do not use diesel to refuel Do not use gasoline to refuel vehicles with a diesel engine. Do not use diesel to refuel vehicles with a gasoline engine. Even a small quantity of the wrong fuel will damage the fuel system and engine.

accidentally refuel with the wrong fuel. Do not switch on the ignition if you accidentally refuel with the wrong fuel.

Otherwise, the fuel will enter the fuel lines.

Notify a qualified specialist workshop and have the fuel tank and fuel lines drained completely.

    Refueling
    ...

    Gasoline
    Fuel grade You should only refuel with unleaded premium-grade gasoline as this avoids damaging the catalytic converter. If engine running problems are apparent, have the cause checked immedia ...

    See also:

    Automatic transmission
    7 speed automatic transmission The automatic transmission in your vehicle is electronically controlled by a transmission control module to produce maximum efficiency and smooth operation. Sho ...

    Indicator lights
    Adaptive Front lighting System (AFS) indicator light (if so equipped) When the ignition switch is pushed to the ON position, the Adaptive Front lighting System (AFS) indicator light will ill ...

    Restoring the factory settings
    ► Press the buttons simultaneously for approximately six seconds until the battery check lamp flashes twice. ...