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:
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Folding the rear bench seat forwards
If the driver's or front-passenger seat is
set for a larger person, it may not be
possible to fold the rear bench seat
forwards. In this case, move the front seats
as far forward as possible.
...
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