2003 Mercedes S-Class Owner's Manual - Page 183

Controls in detail Automatic climate control Rear window defroster The rear window defroster uses a large amount of power. To keep 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 Press button F ( page 175). The indicator lamp on the button lights up. Deactivating Press button F ( page 175) again. The indicator lamp on the button goes out. Deactivating the climate control system Deactivating It is possible to completely deactivate the automatic climate control system. Press button M ( page 175). The display shows "0". Reactivating There are several ways to reactivate the automatic climate control system: Press one of the following buttons, M, P, U, a temperature control switch ( page 175) or air volume switch 9 on the automatic climate control panel. Warning! 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. ! If the rear window defroster switches off too soon and the indicator lamp starts blinking, this means that too many electrical consumers are operating simultaneously and there is insufficient voltage in the battery. The system responds automatically by deactivating the rear window defroster. As soon as the battery has sufficient voltage, the rear window defroster automatically switches on again. 183