2006 Mercedes R-Class Owner's Manual - Page 244

Controls in detail 3-zone automatic climate control* Deactivating Press button ; ( page 232) again. The indicator lamp on the button goes out. 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 38). Press button 9 ( page 232). The indicator lamp on the button comes on. Deactivating Press button 9. The indicator lamp on the button goes out. i If you manually set the temperature, air volume or air distribution for the passenger side or the rear passenger compartment when the MONO setting is active, the MONO setting will be switched off. 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 automatic 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 243