Mercedes-Benz GL-Class: Important safety notes - Setting the air vents - Climate control - Mercedes-Benz GL-Class Owner's ManualMercedes-Benz GL-Class: Important safety notes

WARNING When operating the climate control, the air 
When operating the climate control, the air that enters the passenger compartment through the air vents can be very hot or very cold (depending on the set temperature). This could cause burns or frostbite to unprotected skin in the immediate area of the air vents.
Always keep sufficient distance between unprotected parts of the body and the air vents. If necessary, use the air distribution adjustment to direct the air to air vents in the vehicle interior that are not in the immediate area of unprotected skin.

In order to ensure the direct flow of fresh air through the air vents into the vehicle interior, please observe the following notes:

keep the air intake grille on the hood free of blockages, such as ice, snow or leaves
never cover the air vents or air intake grille in the vehicle interior.

the sliders of the air vents to the center For virtually draft-free ventilation, adjust the sliders of the air vents to the center position.

    Setting the center air vents
    1 Center air vent, left 2 Center air vent, right 3 Center vent thumbwheel, right 4 Center vent thumbwheel, left ► To open/close: turn thumbwheels 3 and 4 to the right or left. ...

    See also:

    Voice Recognition
    The navigation system's voice recognition allows for hands-free operation of the navigation system, audio system, and OnStar (if equipped) features. Voice recognition can be used when the igniti ...

    Mud-ruts
    This program should be used for crossing terrain that is muddy, rutted, soft or uneven. Low range is recommended for this program and if not selected, the message center will prompt you. If th ...

    Automatic transmission high to low range
    1. With the vehicle slowing down, and traveling between 24 mph (40 km/h) and 2 mph (3 km/h), select N. 2. Press the rear of the transfer gearbox switch to select Lo. 3. Wait for the range ch ...