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:

    Under hood covers - refitting
    NOTICE Before refitting the underhood covers, ensure that no pipes, cables or other items, have been trapped between the cover and casing. 1. Slide the rear edge of the cover under the rubber ...

    Emergency Tensioning Devices, beltforce limiters
    The seat belts for the front seats are equipped with ETDs/belt buckle tensioners and seat belt force limiters. The outer seat belts in the second row of seats are equipped with ETDs and seat belt f ...

    High Intensity Discharge (HID) Lighting
    WARNING The low beam high intensity discharge lighting system operates at a very high voltage. If you try to service any of the system components, you could be seriously injured. Have your deal ...