2005 Mercedes SLK-Class Owner's Manual - Page 178

Controls in detail Climate control i If you press the air recirculation switch , and keep it pressed and no side window was operated manually, the side windows will reopen to their previous position. Air conditioning The air conditioning is operational while the engine is running and cools the interior air to the temperature set by the operator. The air conditioning uses the refrigerant R134a. This refrigerant is free of CFCs which are harmful to the ozone layer. 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 air condition on/off switch ° ( page 175). The indicator lamp on the air condition on/off switch ° comes on. i Condensation may drip 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 the weather conditions are warm. The windows can fog up more quickly. Window fogging may impair visibility and endanger you and others. 178