2003 Mercedes ML-Class Owner's Manual - Page 130

Controls in detail Automatic climate control Activating Moist air can fog up the windows. You can dehumidify the air with the air conditioning. Press button ° again. The indicator lamp on the button ° goes out. The air conditioning system 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. Deactivating Press button °. The indicator lamp on button ° goes out. 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 i How long the system will provide heating depends on the coolant temperature and the temperature set in the climate control. The blower will run at lower speed regardless of the air volume control setting. Activating Turn the key in the steering lock to position 1. Press button ° ( page 125). The indicator lamp on button ° comes on. ! If the ° button on the automatic climate control panel starts to blink, this indicates that the air conditioning system is losing refrigerant. The compressor has turned itself off. The air conditioning cannot be turned on again. Have the air conditioning system checked at the nearest authorized Mercedes-Benz Light Truck Center. 130