Opening the DEF filler cap

The filler neck for DEF is behind the fuel filler flap.

The fuel filler flap is unlocked or locked automatically when you open or close the vehicle with the SmartKey or with KEYLESSGO.

- Switch off the ignition.

- Switch off the ignition.
- Press the fuel filler flap in the direction of arrow 1.
The fuel filler flap swings up.
- Turn blue DEF filler cap 2 counterclockwise and remove it.
DEF filler cap 2 is secured with a plastic strap.

    See also:

    Important safety notes
    WARNING COMAND is classified as a Class 1 laser product. You must not open the casing. If you open the casing, or if the casing is faulty or damaged, there is a risk of exposure to invisibl ...

    Activating/deactivating PRE-SAFE® Brake
    PRE-SAFE® Brake is only available in vehicles with DISTRONIC PLUS. •► Press the button on the steering wheel to select the DriveAssist menu. •► Press to select PRE-SAFE Brake. ...

    Tire characteristics
    Tire data is vehicle-specific and may deviate from the data in the example. This information describes the tire cord and the number of layers in sidewall 1 and under the tread 2. ...