2009 Mercedes R-Class Owner's Manual - Page 183

Controls in detail Climate control Notes on climate control The climate control is operational whenever the engine is running. You can operate the climate control system in either the automatic or manual mode. The system cools or heats the interior depending on the selected interior temperature and the current outside temperature. Nearly all dust particles, pollutants and odors are filtered out before outside air enters the passenger compartment through the air distribution system. G Warning! Follow the recommended settings for heating and cooling given on the following pages. Otherwise the windows could fog up, impairing visibility and endangering you and others. Keep the air intake grille in front of the windshield free of snow and debris. X X Deactivating: Press button ´. The indicator lamp in the button comes on. Reactivating: Press button U. G Warning! Severe conditions (e.g. strong air pollution) may require replacement of the filter before its scheduled replacement interval. A clogged filter will reduce the air volume to the interior and the windows could fog up, impairing visibility and endangering you and others. Have a clogged filter replaced as soon as possible at an authorized Mercedes-Benz Center. The air conditioning will not engage (no cooling) if the A/C mode is deactivated (Y page 182). i If the vehicle interior is hot, ventilate the interior before driving off, see "Summer opening feature" (Y page 127). 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. i You can also press button ´ on the climate control panel. If you press button | to reactivate the climate control system, the defrosting mode is activated. Deactivating the rear climate control from the front X X Deactivating: Press button :. The indicator lamp in the button comes on. Reactivating: Press button :. The indicator lamp in the button goes out. Z 181