2007 Mercedes GL-Class Owner's Manual - Page 224

Controls in detail Climate control Adjusting air distribution Move air vent slider 2 to the left, right, up, or down to direct the air in the desired direction. Front defroster You can use this setting to defrost the windshield, for example if it is iced up. You can also use it to defog the windshield and door windows. The climate control switches to the following functions automatically: 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 Adjustments You can adjust the air volume and the temperature when the front defroster is switched on. The air flow will remain on the windshield and door windows. Press button ˜ to decrease or button Q to increase air volume ( page 218) to the desired level. or Turn temperature control 1 and/or 7 ( page 218) slightly in any direction. Heating switches to the temperature that was set before the front defroster was switched on. The indicator lamp on button 0 or, depending on vehicle production date, button | goes out. The indicator lamp on button 9 comes on. The air volume decreases/increases to the next lower/higher blower speed and heating switches to the temperature that was set before the front defroster was switched on. The indicator lamp on button 0 or, depending on vehicle production date, button | goes out. The indicator lamp on button 9 comes on. i Keep this setting selected only until the windshield or the door windows are clear again. Activating Press button 0 or, depending on vehicle production date, button | ( page 218). The indicator lamp on the button comes on. 223