2007 Mercedes GL-Class Owner's Manual - Page 240

Controls in detail 3-zone automatic climate control* Maximum cooling MAXCOOL If the air distribution control as well as the airflow volume control are set to U and there is a high need for cooling, the MAXCOOL function is activated. "MAXCOOL" appears in the front and rear display. This provides the fastest possible cooling of the vehicle interior (when windows and tilt/sliding sunroof* are closed). 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. Warning! Activating Press button : ( page 232). The indicator lamp on the button comes on. i The air recirculation mode is activated automatically at high outside temperatures. 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. If you have turned off the air conditioning ( page 241) or the outside temperature is below 41°F (5°C), the air recirculation mode will not switch on automatically. 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 241) is activated, or press button 0 or, depending on vehicle production date, button |. i To cool the interior as fast as possible, the automatic climate control automatically switches to air recirculation. The indicator lamp on button : is not lit when the system switches to air recirculation automatically. 239