2009 Mercedes SL-Class Owner's Manual - Page 175

Controls in detail Retractable hardtop Rear window defroster G Warning! Any accumulation of snow and ice should be removed from the rear window before driving. Visibility could otherwise be impaired, endangering you and others. 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 switched off after some time of operation depending on the outside temperature. X Switch on the ignition. X ! 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 switches back on automatically. Retractable hardtop Safety notes For safety reasons, the retractable hardtop can only be opened and closed when the vehicle is standing still. Switching on: Press button ¯. The indicator lamp in the button comes on. ! 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. RClose the retractable hardtop. The rear window defroster can then be switched on. X G Observe Safety notes, see page 60. G Warning! To prevent possible accidents, only drive the vehicle with the retractable hardtop either completely closed and locked, or fully lowered into its storage compartment. If the retractable hardtop does not completely open or close, the roof hydraulics will lose pressure and the retractable hardtop is lowered Rafter approximately 7 minutes when the ignition is switched on Rafter approximately 15 seconds when the ignition is switched off Shortly before the retractable hardtop is lowered, a warning will sound. In the multifunction display you will see K and the message Retractable Roof Lowering. Z Switching off: Press button ¯ again. 173