2009 Mercedes S-Class Owner's Manual - Page 187

Controls in detail Climate control system up, impairing visibility and endangering you and others. X Dual-zone automatic climate control X Keep the air intake grille in front of the windshield free of snow and debris. Do not obstruct air flow by placing objects on the air flow-through exhaust slots below the rear window. Deactivating: Press button ´. OFF appears in display 5 (Y page 180). X Reactivating: Press button ´. Display 5 comes on. The previous settings are once again in effect. up more quickly. Window fogging may impair visibility and endanger 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. The interior air will then no longer be cooled or dehumidified. X Press button 2. The indicator lamp in the button goes out. The cooling function switches off after a short delay. i If the vehicle interior is hot, ventilate the interior before driving off, see "Summer opening feature" (Y page 122). The climate control will then adjust the interior temperature to the set value much faster. Deactivating the climate control system G Warning! When the climate control system is switched off, the outside air supply and circulation are also switched off. Only choose this setting for a short time. Otherwise the windows could fog up, impairing visibility and endangering you and others. 4-zone automatic climate control X Deactivating: Press button ´. 0 appears in display 4 (Y page 182). X Reactivating: Press button ´. Display 4 comes on. The previous settings are once again in effect. Air conditioning The air conditioning is operational while the engine is running and cools the interior air to the temperature set by the operator. In addition, the air conditioning dehumidifies the interior air and helps prevent window fogging. Activating Moist air can fog up the windows. You can dehumidify the interior air with the air conditioning. X Press button 2. The indicator lamp in the button comes on. The air conditioning uses the refrigerant R134a. This refrigerant is free of CFCs which are harmful to the ozone layer. G Warning! If you switch off the cooling function, the vehicle will not be cooled when weather conditions are warm. The windows can fog Z 185