2011 Mercedes SL-Class Owner's Manual - Page 156

154 Climate control system MAX COOL is only operational when the engine is running. If the air distribution controls as well as the air volume control are set to à and there is a high need for cooling, MAX COOL is activated. "MAX COOL" appears in temperature controls C and H (Y page 148). This provides the fastest possible cooling of the vehicle interior (when retractable hardtop is closed). Controls in detail i The air recirculation mode is activated automatically at high outside temperatures. The indicator lamp in button g is not lit when the air recirculation mode is switched on automatically. A quantity of outside air is added after approximately 30 minutes. X Deactivating: Press button g again. The indicator lamp in the button goes out. Automatic climate control panel with MAX COOL activated i The manually selected air recirculation mode is deactivated automatically: Rafter 5 minutes if the outside temperature is below approximately 41‡ (5†) Rafter 5 minutes if the air conditioning is turned off Rafter 30 minutes if the outside temperature is above approximately 41‡ (5†) Residual heat and ventilation 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. With the engine turned 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. G Warning! i If you switch on the residual heat function when outside temperatures are high, only the ventilation will be switched on. i How long the system will provide heating depends on the coolant temperature and the selected temperature. The blower will run at low speed regardless of the air distribution control setting. X X X 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 ¬. X Activating: Switch off the ignition. Press button Á. The indicator lamp in the button comes on. Deactivating: Press button Á. The indicator lamp in the button goes out. Activating: Press button g. The indicator lamp in the button comes on.