32 Keys, doors and windowsInitialising the power windowsIf the windows cannot be closedautomatically (e.g. afterdisconnecting the vehicle battery),a warning message or a warning codeis displayed in the Driver InformationCentre.Vehicle messages 3 114.Activate the window electronics asfollows:1. Close doors.2. Switch on ignition.3. Pull switch until the window isclosed and keep pulling foradditional 2 seconds.4. Repeat for each window.Heated rear windowOperated by pressing the Ü button.Heating works with the enginerunning and is switched offautomatically after a short time.Depending on the engine type, theheated rear window comes onautomatically when the diesel particlefilter is being cleaned.Sun visorsThe sun visors can be folded down orswivelled to the side to preventdazzling.If the sun visors have integral mirrors,the mirror covers should be closedwhen driving.A ticket holder is located on thebackside of the sun visor.