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

Controls in detail 3-zone automatic climate control* Adjusting air volume Five blower speeds are available. Press button ˜ to decrease or button Q to increase air volume ( page 234) to the desired level. The indicator lamp on button U goes out. The AUTO display disappears in the display e ( page 234) and the automatic mode is switched off. The selected blower speed appears in the display e ( page 234). Front defroster You can use this setting to defrost the windshield, such as when it is iced up. You can also use it to defog the windshield and side windows. The automatic climate control switches to the following functions automatically: maximum blower speed and heating power air flows onto the windshield and the front side 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 ( page 234). The indicator lamp on the button goes out. Defrosting is turned off. The previous settings are once again in effect. i Keep this setting selected only until the windshield or the side windows are clear again. When the defrost setting has been selected, only the rear window defroster can be switched on. No other settings are possible. Activating Press button 0 ( page 234). The indicator lamp on the button comes on. i To switch off, you can also press button ´ or U ( page 234). 239