Premium-grade unleaded gasoline

To ensure the longevity and full To ensure the longevity and full performance of the engine, only premiumgrade unleaded gasoline may be used.
If there is no premium-grade unleaded gasoline available and regular-grade unleaded gasoline may be used; please observe the following precautions:
- only fill the fuel tank to half full with regular-grade unleaded gasoline and fill the rest with premium-grade unleaded gasoline as soon as possible.
- do not drive at the maximum speed.
- avoid sudden acceleration.
- if the vehicle is carrying a light load, e.g. two passengers without luggage, do not allow the engine to rev above 3,000 rpm.
- if the vehicle is fully loaded or is being operated in mountainous terrain, do not depress the accelerator pedal further than 2/3 of the pedal travel.

    See also:

    Cargo & Towing
    When properly equipped with the optional trailer hitch, the GLK350 is rated to tow up to 3,500 pounds. ...

    Cornering light function
    The cornering light function improves the illumination of the road over a wide angle in the direction you are turning, enabling better visibility in tight bends, for example. It can only be acti ...

    Crash-responsive emergency lighting
    The interior lighting is activated automatically if the vehicle is involved in an accident. - To switch off the crash-responsive emergency lighting: press the hazard warning lamp button. or - ...