Premium-grade unleaded gasoline

performance of the engine, only premiumgrade 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:

    Storing and maintaining the currentspeed
    You can store the current speed if you are driving faster than 20 mph (30 km/h). ► Accelerate the vehicle to the desired speed. ► Briefly press the cruise control lever up 1 or down ...

    Exterior & Styling
    Particularly from the rear, the GL's appearance looks a bit like Mercedes' original M-Class — so much so that a passenger walked up to an older M thinking it was the GL. The GL550's 21-inch wheels ...

    Reporting malfunctions relevant to safety
    For the USA only: The following text is reproduced as required of all manufacturers according to Title 49, Code of U.S. Federal Regulations, Part 575 pursuant to the National Traffic and Motor Ve ...