2008 Mercedes SL-Class Owner's Manual - Page 188

Controls in detail Good visibility Glare through a door window Swing respective sun visor down. Disengage the sun visor from mounting 1. 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. Warning! Deactivating Press button F ( page 190) once more. The indicator lamp on the button goes out. i When the sun visor is disengaged from mounting 1, vanity mirror lamp 3 switches off. Pivot the sun visor to the side. ! 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. ! To avoid damage to vanity mirror cover 2, make sure it is closed before pivoting the sun visor to the side. Vanity mirror Swing respective sun visor down. Flip up vanity mirror cover 2 to access the vanity mirror. Vanity mirror lamp 3 comes on. After using the vanity mirror, flip down vanity mirror cover 2. Swing the sun visor up. 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. Switch on the ignition ( page 40). Activating Press button F on the automatic climate control panel ( page 190). The indicator lamp on the button comes 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. 187