2007 Mercedes G-Class Owner's Manual - Page 191

Controls in detail Climate control Activating Moist air can fog up the windows. You can dehumidify the air with the air conditioning. Press button 9 ( page 183) once more. The indicator lamp on the button comes on. The air conditioning uses the refrigerant R134a. This refrigerant is free of CFCs which are harmful to the ozone layer. 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 Turn the SmartKey in the starter switch to position 0 or 1 ( page 39). or Remove the SmartKey from the starter switch. Press button 9 ( page 183). The indicator lamp on the button comes on. Deactivating Press button 9 ( page 183) once more. The indicator lamp on the button goes out. 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. ! If the air conditioning cannot be turned on again, this indicates that the air conditioning is losing refrigerant. The compressor has turned itself off. Have the air conditioning checked at the nearest authorized Mercedes-Benz Light Truck Center. 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 190