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:

    Correct driver's seat position
    Observe the safety guidelines on seat adjustment. Check whether you have adjusted seat 3 properly. Manual and electrical seat adjustment. Electrical seat adjustment. When adjusting the se ...

    Low-beam headlamps (halogen headlamps)
    Low-beam headlamps (halogen headlamps) Switch off the lights. Open the hood. Turn housing cover 1 counter-clockwise and pull it out. Turn bulb holder 2 counter-clockwise and pull it out. ...

    Service messages
    Information on the type of service and service intervals (see separate Service Booklet). You can obtain further information from an authorized Mercedes-Benz Center or at http://www.mbusa.com (U ...