2008 Mercedes R-Class Owner's Manual - Page 208

Controls in detail Good visibility Rear door window sunshade* ! With the sunshade raised and the respective door window open, the sunshade could disengage and snap back when driving at high vehicle speeds, e.g. on highways, and damage the retractor. You should therefore always either close the door window or lower the sunshade when driving at high speed. 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. Warning! Switch on the ignition ( page 39). Activating Press button 1 on the climate control panel ( page 210) or the automatic climate control* panel ( page 224). The indicator lamp on the button comes on. Deactivating Press button 1 once more. The indicator lamp on the button goes out. 1 Holder 2 Tab To raise sunshade, pull on tab 2 and engage it in holder 1. To lower sunshade, disengage tab 2 from holder 1 and guide retraction. ! Always guide the sunshade. Do not let it snap back abruptly, as the retractor could be damaged. 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 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. 207