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.
- 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:
High-beam flasher
To switch on: turn the SmartKey in the
ignition lock to position 1 or 2 or start the
engine.
Pull the combination switch in the direction
of arrow 3. ...
Opening automatically from the inside
WARNING
Make sure the trunk lid is closed when the
engine is running and while driving. Among
other dangers, deadly carbon monoxide (CO)
gases may enter the vehicle interior resulting
in un ...
Problems with the rear window
defroster
The rear window defroster has deactivated
itself prematurely or cannot be activated.
Switch off any consumers that are not
required, e.g. reading lamps or interior
lighting.
When the battery ...
