2006 Mercedes SL-Class Owner's Manual - Page 180

Controls in detail Good visibility i If sunlight enters through a side window, close mirror cover 2 (if open), and disengage sun visor from mounting 1 and pivot sun visor to the side. If the sun visor is disengaged from mounting 1, mirror lamp 3 will switch off. Rear window defroster The rear window defroster uses a large amount of power. To keep the battery drain to a minimum, switch off the defroster as soon as the rear window is clear. The defroster is automatically deactivated after approximately 6 to 17 minutes of operation depending on the outside temperature. Activating Switch on the ignition ( page 36). Press button F on the automatic climate control panel ( page 181). The indicator lamp on the button comes on. Deactivating Press button F ( page 181) once more. The indicator lamp on the button goes out. Warning! ! The rear window defroster cannot be switched on when the retractable hardtop is open. The indicator lamp will start flashing if the hardtop is open. Close the retractable hardtop. The rear window defroster can then be switched on. ! If the rear window defroster switches off too soon and the indicator lamp starts flashing, too many electrical consumers are operating simultaneously and there is insufficient voltage in the battery. The system responds automatically by switching the rear window defroster off. As soon as the battery has sufficient voltage, the rear window defroster automatically switches back on automatically. G Any accumulation of snow and ice should be removed from the rear window before driving. Visibility could otherwise be impaired, endangering you and others. 179