2010 Mercedes GL-Class Owner's Manual - Page 181

Climate control Adjusting air volume X X 179 or X Front defroster You can use this setting to defrost the windshield, for example if it is iced up. You can also defog the windshield and the side windows. i Keep this setting selected only until the windshield or the side windows are clear again. Activating X Turn temperature control : and/or C (Y page 175) slightly in any direction. Heating switches to the temperature that was set before the front defroster was switched on. The indicator lamp in button ¦ goes out. The indicator lamp in button Á comes on. Press button ¦. The indicator lamp in the button comes on. The climate control switches to the following functions automatically: Rmost efficient blower speed and heating power, depending on outside temperature Rair i The air conditioning compressor remains on even if the indicator lamp in button ¦ goes out. This helps to prevent the windshield from fogging. Deactivating X flows onto the windshield and the front door windows (side air vents must be open) air conditioning compressor switches on at outside temperatures above approximately 41‡ (5†) for airdrying Press button ¦ again. The indicator lamp in the button goes out. Defrosting is turned off. The previous settings are once again in effect. The air conditioning compressor remains switched on. Rthe i To deactivate, you can also press button ^ or Ã. Windshield fogged on the outside X X 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 front door windows. Switch the windshield wipers on (Y page 103). Press air distribution button P or O. Z Controls in detail Decreasing/increasing: Press button I or K. The automatic mode is switched off. The selected blower speed is shown in air volume display G (Y page 175). When using the Voice Control System, the blower speed reduces automatically. When the Voice Control System is not used anymore, the blower speed increases to the previously selected level. Press button I to decrease or button K to increase air volume to the desired level. 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 in button ¦ goes out. The indicator lamp in button Á comes on.