2009 Mercedes CL-Class Owner's Manual - Page 394

Controls in detail Climate control system sliding sunroof or tilt/sliding panel are closed). i Maximum cooling MAX COOL is only available when the engine is running. Air recirculation mode Switch to air recirculation mode to prevent unpleasant odors from entering the vehicle from the outside (e. g. before driving through a tunnel). This setting cuts off the intake of outside air and recirculates the air in the passenger compartment. i The air recirculation mode is activated automatically at high outside temperatures. The indicator lamp in rocker switch , is not lit when the air recirculation mode is switched on automatically. A quantity of outside air is added when the cooling demand is not at maximum. If the air conditioning has been turned off or the outside temperature is below 41‡ (5†), the air recirculation mode will not switch on automatically. X i The manually selected air recirculation mode is deactivated automatically: Rafter 5 minutes if the outside temperature is below approximately 41‡ (5†) Rafter Rafter 5 minutes if the air conditioning is turned off 30 minutes if the outside temperature is above approximately 41‡ (5†) G Warning! Fogged windows impair visibility, endangering you and others. If the windows begin to fog on the inside, switching off the air recirculation mode immediately should clear interior window fogging. If interior window fogging persists, make sure the air conditioning is activated, or press button y. X Deactivating: Press rocker switch , up or down. The indicator lamp in the rocker switch goes out. Residual heat and ventilation With the engine switched off, it is possible to continue to heat or ventilate the interior for up to 30 minutes. This feature makes use of the residual heat produced by the engine. i If you switch on the residual heat function when outside temperatures are high, only the ventilation will be switched on. i Regardless of the selected air volume, the blower operates at low speed when heating. In case of ventilation the blower operates at higher speed. i How long the system will provide heating depends on the coolant temperature and Activating: Press rocker switch , up or down. The indicator lamp in the rocker switch comes on. 392