2006 Mercedes S-Class Owner's Manual - Page 203

Controls in detail 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. Activating Moist air can fog up the windows. You can dehumidify the air with the air conditioning. Press ± again ( page 193). The indicator lamp on button ± goes out. The air conditioning uses the refrigerant R134a. This refrigerant is free of CFCs which are harmful to the ozone layer. Residual heat and ventilation With the engine switched off, it is possible to continue to heat or ventilate the interior. This feature makes use of the residual heat produced by the engine. Activating Turn the SmartKey in the starter switch to position 1 or 0, or remove it from the starter switch. Press button T ( page 193). The indicator lamp on button T comes on. 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 ± ( page 193). The indicator lamp on the button ± comes on. ! If button ± on the automatic climate control panel starts to flash, this indicates that the air conditioning is losing refrigerant. The compressor has turned itself off. The air conditioning cannot be turned on again. Have the air conditioning checked at the nearest authorized Mercedes-Benz Center. 202