2011 Mercedes C-Class Owner's Manual - Page 128

126 Setting the air vents i Air-recirculation mode is activated automatically at high outside temperatures. When air-recirculation mode is activated automatically, the indicator lamp in the g button is not lit. Outside air is added after about 30 minutes. X In order to ensure the direct flow of fresh air through the air vents into the vehicle interior, please observe the following notes: Rkeep To deactivate: press the g button. The indicator lamp in the g button goes out. the air inlet between the windshield and 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. Climate control i Air-recirculation mode switches off automatically: Rafter approximately five minutes if outside temperatures are under about 41 ‡ (5 †) Rafter approximately five minutes if cooling with air dehumidification is deactivated Rafter approximately 30 minutes if outside temperatures are over about 41 ‡ (5 †) Setting the air vents Important safety notes G Warning 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. 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 To open/close: turn thumbwheels = and ? up or down. Setting the side air vents