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.

    See also:

    Cleaning the steering wheel and gear or selector lever
    – Thoroughly wipe with a damp cloth or use leather care agents that have been recommended and approved by Mercedes- Benz. ...

    Activating/deactivating
    WARNING Any accumulation of snow and ice should be removed from the rear window before driving. Visibility could otherwise be impaired, endangering you and others. The rear window defroster ...

    Folding the rear bench seat back
    – Fold seat backrest 2 back until it engages. – Swing seat cushion 1 back. – Pull up and adjust the head restraints if necessary. ...