2007 Mercedes CLS-Class Owner's Manual - Page 202

Controls in detail 4-zone automatic climate control Activating Press button , ( page 192) or ( page 193). The indicator lamp on the button comes on. Deactivating Press button , ( page 192) or ( page 193) again. The indicator lamp on the button goes out. Air recirculation mode with convenience closing or opening feature Warning! G i The air recirculation mode is activated automatically at high outside temperatures and if the concentration of carbon monoxide (CO) and nitrogen oxide in the outside air increases, for example in a tunnel. The indicator lamp on button , is not lit when the air recirculation mode is automatically switched on. A quantity of outside air is added after approximately 30 minutes. i The air recirculation 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) Never operate the windows and tilt/sliding sunroof or tilt/sliding panel* if there is the possibility of anyone being harmed by the opening or closing procedure. In the event that the procedure causes potential danger, the closing of the windows can be immediately halted by pressing or pulling the respective window switch. The closing of the tilt/sliding sunroof can be immediately halted by moving the switch for the tilt/sliding sunroof in any direction. The closing of the windows and the tilt/sliding sunroof can be reversed by again pressing and holding the , button. 201