2009 Mercedes SL-Class Owner's Manual - Page 171

Controls in detail Climate control system Please comply with the following instructions in order for the climate control to function optimally: X Keep the air intake grille in front of the windshield free of snow, leaves, sticks, and any other debris. X 3 Thumbwheel for air volume control for center air vents 4 Left center air vent, adjustable X 2 Left side air vent, adjustable 3 Thumbwheel for air volume control for adjustable left side air vent X Always keep all air vents and grilles in the passenger compartment free from obstruction. Opening/closing adjustable center air vents: Turn thumbwheel 3 upward to the first stop or downward. Center air vents 2 and 4 are open or closed. Opening/closing cockpit air vent: Turn thumbwheel 3 upward all the way or downward. Cockpit air vent 1 is open or closed. Opening/closing: Turn thumbwheel 3 upward or downward. Ventilated glove box The glove box can be ventilated, for instance to cool its contents, when the automatic 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. i For draft-free ventilation, move the adjustable center and side air vents to the middle position. Center air vents X Side air vents ! 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. 1 Cockpit air vent, fixed 2 Right center air vent, adjustable Example illustration driver's side 1 Left side defroster air vent, fixed Z 169