2010 Mercedes ML-Class Owner's Manual - Page 184

182 3-zone automatic climate control was set before the front defroster was switched on. The indicator lamp in button ¦ goes out. The indicator lamp in button Á comes on. or X X Press buttons O/c19 and P/ \19. Air recirculation mode Switch to air recirculation mode to prevent unpleasant odors from entering the vehicle from the outside (e. g. before driving through a tunnel). This setting cuts off the intake of outside air and recirculates the air in the passenger compartment. Turn temperature control : and/or C (USA only) (Y page 173) or : and/or E (Canada only) (Y page 175) slightly in any direction. Heating switches to the temperature that was set before the front defroster was switched on. The indicator lamp in button ¦ goes out. The indicator lamp in button Á comes on. Controls in detail G Warning! i The air conditioning compressor remains on even if the indicator lamp in button ¦ goes out. This helps to prevent the windshield from fogging. Deactivating X Fogged windows impair visibility, endangering you and others. If the windows begin to fog on the inside, switching off the air recirculation mode immediately should clear interior window fogging. If interior window fogging persists, make sure the air conditioning is activated, or press button ¦. X Press button ¦ once more. The indicator lamp in the button goes out. Defrosting is turned off. The previous settings are once again in effect. The air conditioning compressor remains switched on. Activating: Press button d. The indicator lamp in the button comes on. i To deactivate, you can also press button ^ or Ã. Windshield fogged on the outside X Switch the windshield wipers on (Y page 98). X Press button Ã. The indicator lamp in the button goes out. Air volume and air distribution are controlled separately for each zone. If the automatic air volume and air distribution are switched off: i The air recirculation mode is activated automatically at high outside temperatures. The indicator lamp in button d is not lit when the air recirculation mode is switched on automatically. A quantity of outside air is added after approximately 30 minutes. If you have turned off the air conditioning or the outside temperature is below 41‡ (5†), the air recirculation mode will not switch on automatically. X Deactivating: Press button d. The indicator lamp in the button goes out. 19 Canada only