2009 Mercedes SLR McLaren Owner's Manual - Page 193

Controls in detail Automatic climate control Air recirculation mode Switch to air recirculation mode to prevent unpleasant odors from entering the vehicle from the outside. This setting cuts off the intake of outside air and recirculates the air in the passenger compartment. Warning! Activating Press button , ( page 186). The indicator lamp on the button comes on. matically at high outside temperatures if the concentration of carbon monoxide (CO) and nitrogen oxide (NOX) in the outside air increases, for example in a tunnel A quantity of outside air is added after approximately 30 minutes. If you have turned off the air conditioning ( page 194) or the outside temperature is below 41°F (5°C), the air recirculation mode will not switch on automatically. Deactivating Press button , ( page 186). The indicator lamp on the button goes out. mode is deactivated automatically after 5 minutes if the outside temperature is below approximately 41°F (5°C) after 5 minutes if the air conditioning is turned off after 30 minutes if the outside temperature is above approximately 41°F (5°C) i The air recirculation mode is activated auto- i The manually selected air recirculation G 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 ( page 194) is activated, or press button P. At outside temperatures above 79°F (26°C) the system will not automatically switch back to outside air. 193