2009 Mercedes R-Class Owner's Manual - Page 187
2009 Mercedes R-Class Manual
Page 187 highlights
Controls in detail Climate control i The air recirculation mode is activated automatically at high outside temperatures. The indicator lamp in button : 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 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. Deactivating: Press button :. The indicator lamp in the button goes out. i How long the system will provide heating depends on the coolant temperature and the battery voltage. Regardless of the temperature and air volume set on the climate control panel, an interior temperature is aimed at by 72‡ (22†) and the blower runs on low speed to protect the vehicle battery. X X X Activating: Switch off the ignition. Press button 9. The indicator lamp in the button comes on. Deactivating: Press button 9 again. The indicator lamp in the button goes out. 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†) The residual heat is deactivated automatically: Rwhen Rafter Rif Rif the ignition is switched on approximately 30 minutes Z the battery voltage drops the coolant temperature is too low 185
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