Mercedes-Benz E-Class: Changing the battery - Smart Key battery - Smart Key - Opening/closing - Mercedes-Benz E-Class Owners ManualMercedes-Benz E-Class: Changing the battery

You require a CR 2025 3 V cell battery.

•► Take the mechanical key out of the SmartKey

•► Press mechanical key 2 into the opening

•► Press mechanical key 2 into the opening in the SmartKey in the direction of the arrow until battery tray cover 1 opens.

When doing so, do not hold cover 1 shut.

•► Remove battery tray cover 1.

•► Repeatedly tap the SmartKey against your

•► Repeatedly tap the SmartKey against your palm until battery 3 falls out.

•► Insert the new battery with the positive terminal facing upwards. Use a lint-free cloth to do so.

•► Make sure that the surface of the battery is free from lint, grease and all other forms of contamination.

•► Insert the front tabs of battery tray cover 1 and then press to close it.

•► Insert the mechanical key into the SmartKey.

•► Check the function of all SmartKey buttons on the vehicle.

    Checking the battery
    •► Press the or button. The battery is working properly if battery check lamp 1 lights up briefly If battery check lamp 1 does not light up briefly during the test, the battery is ...

    Problems with the SmartKey
    Problem Possible causes/consequences and  Solutions You cannot lock or unlock the vehicle using the SmartKey. The SmartKey battery is discharged or nearly discharged ...

    See also:

    Calendar
    Display the calendar Appointments during the last 20 and the next 50 days can be displayed. 1. "Office" 2. "Calendar" The appointments on the current day are displayed Sel ...

    Resuming the original route
    If the route section should no longer be bypassed: 1. "Navigation" 2. "Route information" 3. "New route for:" 4. "Remove blocking" ...

    Turning the System On or Off
    VOL/ (Volume/Power): Press to turn the system on and off. Automatic Switch-Off If the infotainment system has been turned on after the ignition is turned off, the system will turn off autom ...