2005 Mercedes C-Class Owner's Manual - Page 183

Controls in detail 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. Press button ± ( page 175). The indicator lamp on the button comes on. 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 ± ( page 175). The indicator lamp on the button goes out. The air conditioning uses the refrigerant R134a. This refrigerant is free of CFCs which are harmful to the ozone layer. 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. ! If the air conditioning cannot be turned on again, this indicates that the air conditioning is losing refrigerant. The compressor has turned itself off. Have the air conditioning checked at the nearest authorized Mercedes-Benz Center. 181