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:
Adding engine oil
WARNING
If engine oil comes into contact with hot
engine parts, it may ignite and you could burn
yourself. Do not spill any engine oil on hot
engine parts.
Environmental note
When adding oil ...
Safety systems
Display messages
Possible causes/consequences and •► Solutions
Currently
Unavailable See
Operator's Manual
Risk of accident
ABS, ESP®, BAS, PRE-SAFE®, the HOLD function ...
Deactivating/activating ESP®
WARNING
Under no circumstances should you
deactivate ESP® when the ESP®
warning lamp in the instrument cluster
flashes. Proceed as follows:
• when driving off, apply as little throttle as p ...
