2008 Mercedes R-Class Owner's Manual - Page 235

Controls in detail 3-zone automatic climate control* Deactivating It is possible to deactivate the air conditioning (cooling) function of the automatic climate control system. The air in the vehicle will then no longer be cooled or dehumidified. Press button 9 ( page 224). The indicator lamp on the button goes out. The cooling function switches off after a short delay. Activating Moist air can fog up the windows. You can dehumidify the air with the air conditioning. Press button 9 again. The indicator lamp on the button comes on. The air conditioning uses the refrigerant R-134a. This refrigerant is free of CFCs which are harmful to the ozone layer. Using driver-side settings for all temperature zones You can use the settings of the driver's side, such as temperature, air volume and air distribution, for all temperature zones. These settings only need to be made once and the automatic climate control system will automatically regulate the settings for all temperature zones quickly and comfortably. Activating Adjust the temperature, air volume and air distribution ( page 224). Press button ; ( page 224). The indicator lamp on the button comes on. The driver-side settings are used for all temperature zones. ! If the air conditioning cannot be turned on again, this indicates that the air conditioning is losing refrigerant. The compressor has turned off. Have the air conditioning checked at the nearest authorized Mercedes-Benz Light Truck Center. 234