Windows fogged up on the outside

Activate automatic climate control. Switch on the windshield wipers.

You should only select this setting until Activate automatic climate control.

the windshield is clear again. You should only select this setting until the windshield is clear again.

    See also:

    The windshield wipers are inoperative
    The windshield wiper drive is malfunctioning. - Select another wiper speed on the combination switch. - Have the windshield wipers checked at a qualified specialist workshop. ...

    Activating the HOLD function
    Make sure that the activation conditions are met. Depress the brake pedal. Quickly depress the brake pedal further until HOLD display 1 appears in the instrument cluster. The HOLD functi ...

    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 ...