2007 Mercedes R-Class Owner's Manual - Page 230

Controls in detail Climate control 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. Activating Switch off the ignition ( page 39). Press button 9 ( page 220). The indicator lamp on the button comes on. Deactivating Press button 9 ( page 220) again. The indicator lamp on the button goes out. Rear climate control* The control panel for the rear climate control is only available if your vehicle is equipped with seat heating for the second-row seats*. The control panel is located on the rear of the front center console. i How long the system will provide heating depends on the coolant temperature the battery voltage Regardless of the temperature and air volume set on the climate control panel, an interior temperature is aimed at by 72°F (22°C) and the blower runs on low speed to protect the vehicle battery. i The residual heat is automatically turned off: when the ignition is switched on after about 30 minutes if the coolant temperature is too low if the battery voltage drops 229