2003 Mercedes E-Class Owner's Manual - Page 181

Controls in detail Automatic climate control* Air conditioner The air conditioner is operational while the engine is running and cools the interior air to the temperature set by the operator. Activating Moist air can fog up the windows. You can dehumidify the air with the air conditioner. Press ACOFF again. The indicator lamp on the ACOFF button goes out. The air conditioner uses the refrigerant R134a. This refrigerant is free of CFCs which are harmful to the ozone layer. Warning! G Any accumulation of snow and ice should be removed from the rear window before driving. Visibility could otherwise be impaired, endangering you and others. i Condensation may drip out from underneath the vehicle. This is normal and not an indication of a malfunction. 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 ACOFF. The indicator lamp on the button ACOFF lights up. ! If the rear window defroster switches off too soon and the indicator lamp starts blinking, this means that too many electrical consumers are operating simultaneously and there is insufficient voltage in the battery. The system responds automatically by deactivating the rear window defroster. As soon as the battery has sufficient voltage, the rear window defroster automatically turns itself back on. ! If the air conditioner cannot be turned on again, this indicates that the air conditioner is losing refrigerant. The compressor has turned itself off. Have the air conditioner checked at the nearest authorized Mercedes-Benz Center. 181