2005 Mercedes E-Class Owner's Manual - Page 216

Controls in detail 4-zone automatic climate control* Air conditioning The air conditioning is operational while the engine is running and cools the interior air to the temperature set by the operator. Deactivating It is possible to deactivate the air conditioning (cooling) function of the climate control system. The air in the vehicle will then no longer be cooled or dehumidified. Climate control design A Press button ± ( page 206). The indicator lamp on the button comes on. ACOFF in the display comes on. Climate control design B Press button 2 ( page 207) again. The indicator lamp on the button comes on. The air conditioning uses the refrigerant R134a. This refrigerant is free of CFCs which are harmful to the ozone layer. The cooling function and heater booster system (Diesel engine) ( page 217) are switched off. Climate control design B Press button 2 ( page 207). The indicator lamp on the button goes out. The cooling function ( page 217) is switched off. Activating Moist air can fog up the windows. You can dehumidify the air with the air conditioning. Climate control design A Press button ± ( page 206) again. The indicator lamp on the button goes out. ACOFF in the display goes out. i Condensation may drip out from underneath the vehicle. This is normal and not an indication of a malfunction. Warning! G If you turn off the cooling function, the vehicle will not be cooled when weather conditions are warm. The windows can fog up more quickly. Window fogging may impair visibility and endanger you and others. 214