2010 Mercedes C-Class Owner's Manual - Page 195

Climate control system For best possible performance of the climate control: X Keep the air intake grille in front of the windshield free of snow, leaves, sticks, and any other debris. X Always keep all air vents and grilles in the passenger compartment free from obstruction. 193 Side air vents i For draft-free ventilation, move the adjustable center and side air vents to the middle position. Center air vents Example illustration driver's side : Left side defroster air vent, fixed ; Left side air vent, adjustable = Thumbwheel for air volume control for adjustable left side air vent X Opening/closing: Turn thumbwheel = upward or downward. Ventilated glove box The glove box can be ventilated, for instance to cool its contents, when the climate control system is activated. The level of airflow to the glove box depends on the airflow and air distribution settings. The temperature of the air is approximately the same as that of the air flowing from the center air vents. : Left center air vent, adjustable ; Right center air vent, adjustable = Thumbwheel for air volume control for adjustable right center air vent ? Thumbwheel for air volume control for adjustable left center air vent X Opening/closing: Turn thumbwheels = and ? upward or downward. ! Close the glove box air vent when heating the vehicle interior. Activate the air conditioning (cooling function) when the outside temperature is high. Otherwise, temperature-sensitive items stored in the glove box could be damaged. Z Controls in detail