2011 Mercedes R-Class Owner's Manual - Page 146

144 X Setting the air vents Turn the SmartKey to position 2 in the ignition lock. X To activate: press the d button. The indicator lamp in the d button lights up. i Air-recirculation mode is activated automatically at high outside temperatures. When air-recirculation mode is activated automatically, the indicator lamp in the d button is not lit. Outside air is added after about 30 minutes. X i If you activate the "residual heat" function at high temperatures, only the ventilation will be activated. The blower runs at medium speed. X Turn the SmartKey to position 0 in the ignition lock or remove it. X To switch on: press the Á button. The indicator lamp in the Á button lights up. X To switch off: press the Á button. The indicator lamp in the Á button goes out. Climate control To deactivate: press the d button. The indicator lamp in the d button goes out. i Air-recirculation mode switches off automatically: Rafter approximately five minutes if outside temperatures are under about 41 ‡ (5 †) Rafter approximately five minutes if cooling with air dehumidification is deactivated Rafter approximately 30 minutes if outside temperatures are over about 41 ‡ (5 †) i The air-recirculation mode does not switch off automatically if outside temperatures exceed 79 ‡ (26 †). After about 30 minutes, outside air will be added.22 Switching the residual heat on/off It is possible to make use of the residual heat of the engine to continue heating the stationary vehicle for up to 30 minutes after the engine has been switched off. The heating time depends on the temperature that has been set. i Residual heat is deactivated automatically: Rafter about 30 minutes Rwhen the ignition is switched on Rif the battery voltage drops Rif the coolant temperature is too low Setting the air vents Important safety guidelines G Warning When operating the climate control, the air that enters the passenger compartment through the air vents can be very hot or very cold (depending on the set temperature). This could cause burns or frostbite to unprotected skin in the immediate area of the air vents. Always keep sufficient distance between unprotected parts of the body and the air vents. If necessary, use the air distribution adjustment to direct the air to air vents in the vehicle interior that are not in the immediate area of unprotected skin. i The blower will run at a low speed regardless of the airflow setting. 22 Vehicles with multi-zone automatic climate control.