2011 Mercedes R-Class Owner's Manual - Page 147

Setting the air vents In order to ensure the direct flow of fresh air through the air vents into the vehicle interior, please observe the following notes: Rkeep X 145 To open/close: turn thumbwheel = up or down. the air inlet grille on the hood free of blockages, such as ice, snow or leaves Rnever cover the vents or air inlet and outlet grilles in the vehicle interior. i Side window defroster vent : is never completely shut, even if side air vent ; is shut. Setting the rear-compartment air vents Setting the center vents in the rear compartment i For virtually draft-free ventilation, adjust the sliders of the air vents to the center position. Setting the center air vents : Center air vent, left ; Center air vent, right = Center vent thumbwheel, right ? Center vent thumbwheel, left X : Rear control panel23 ; Rear-compartment air vent, right = Rear-compartment air vent, left To open/close: turn thumbwheels = and ? up or down. When the climate control panel is switched on/off, the air supply through the rearcompartment air vents is also switched on/ off. Setting the side air vents 23 Vehicles with multi-zone automatic climate control. Z Climate control