2001 Mercedes ML-Class Owner's Manual - Page 106

Rear window defroster Notes: Heavy accumulation of snow and ice should be removed before activating the defroster. The rear window defroster consumes a large amount of electrical power. To keep the battery drain to a minimum, turn off the defroster as soon as the window is clear. The defroster is automatically turned off after approximately 10 to 18 minutes of operation, dependent on the outside temperature. If several power consumers are turned on simultaneously, or the battery is only partially charged, it is possible that the rear window defroster will automatically turn itself off. When this happens, the indicator lamp inside the switch starts blinking for approximately 30 seconds. If within this time the battery has sufficient voltage, the rear window defroster automatically turns itself back on. After approximately 30 seconds without sufficient voltage the rear window defroster switches off (indicator lamp goes out). The switch is located on the center console. With the engine running, press upper half of the switch. Indicator lamp in switch comes on. To cancel, press upper half of the switch again. Indicator lamp in switch goes out. Climate control Instruments and controls Operation Driving 103 Instrument cluster display Practical hints Car care Technical data Index