2007 Mercedes GL-Class Owner's Manual - Page 225

Controls in detail Climate control i The air conditioning compressor remains on even if the indicator lamp in button 0 or, depending on vehicle production date, button | goes out. This helps to prevent the windshield from fogging. Windshield fogged on the outside i Keep this setting selected only until the windshield is clear again. If the automatic air distribution is switched off: Press air distribution button 9 or a ( page 218). 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! Switch the windshield wipers on ( page 64). Press button 0 or, depending on vehicle production date, button | ( page 218). The indicator lamp on the button comes on. The climate control switches automatically to the following functions: most efficient blower speed and heating power, depending on outside temperature air flows onto the windshield and the door windows (side air vents must be open) the air conditioning compressor switches on at outside temperatures above approximately 41°F (5°C) for air-drying Deactivating Press button 0 or, depending on vehicle production date, button | ( page 218) once more. The indicator lamp on the button goes out. Defrosting is turned off. The previous settings are in effect again. The air conditioning compressor remains switched on. G i To switch off, you can also press button ´ or U ( page 218). 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 218) is activated, or press button 0 or, depending on vehicle production date, button |. 224