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:
Important safety notes
The HomeLink® garage door opener
integrated in the rear-view mirror allows you
to operate up to three different door and gate
systems.
Certain garage door drives are
incompatible with the in ...
Problems with the engine
Problem
Possible causes/consequences and
Solutions
The engine does not start. The starter motor can be
heard.
• There is a malfunction in the engine electronics.
• Th ...
Frequencies for the garage door opener
The radio type approval number and the frequency range for the garage door
opener can be
found on the Internet at: http://www.mercedes-benz.de/betriebsanleitung. ...
