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:
Message memory
The on-board computer saves certain display messages. You can call up the
display messages
in the message memory.
– Press the or
button on the steering wheel to
select the Serv. menu.
If th ...
Opening and closing
Overhead control panel
1. To open
2. To open
3. To close
•► Turn the SmartKey to position 1 or 2 in the
ignition lock.
•► Press or pull the switch in the
corresponding di ...
Selecting an active partition (USB mass
storage devices only)
You can select this function for USB mass
storage devices when the storage device is
partitioned. Up to four partitions (primary or
logical; FAT format) are supported.
The Windows formatting p ...
