2010 Mercedes ML-Class Owner's Manual - Page 174

172 Climate control The indicator lamp in button ¦ goes out. The indicator lamp in button Á comes on. or X G Warning! Controls in detail Turn temperature control : and/or C (Y page 167) 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. 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 Activating: Press button d. The indicator lamp in the button comes on. 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 Press button ¦ again. 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. 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 i To deactivate, you can also press button ^ or Ã. Windshield fogged on the outside X X Deactivating: Press button d. The indicator lamp in the button goes out. Switch the windshield wipers on (Y page 98). Press air distribution button P or O. 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. i The manually selected air recirculation mode is deactivated automatically: Rafter 5 minutes if the outside temperature is below approximately 41‡ (5†) Rafter 5 minutes if the air conditioning and air-drying are turned off Rafter 30 minutes if the outside temperature is above approximately 41‡ (5†) Residual heat and ventilation With the engine switched off, it is possible to continue to heat or ventilate the interior for up to 30 minutes. This feature makes use of the residual heat produced by the engine.