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:
Notes on regularly inspecting wheels and tires
WARNING
Regularly check the tires for damage. Damaged tires can cause tire inflation
pressure loss. As a result, you could lose control of your vehicle.
Worn, old tires can cause accidents. I ...
Tips for driving with DISTRONIC PLUS
Important safety notes
The following contains descriptions of certain
road and traffic conditions in which you must
be particularly attentive. In such situations,
brake if necessary. DISTRONIC ...
Defrosting the windows
Windows fogged up on the inside
► Activate the cooling with air
dehumidification function .
► Activate automatic mode
.
► If the windows continue to fog up,
activate
the defr ...
