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:
Please bear the following in mind
At the onset of winter, have your vehicle
winterproofed at a qualified specialist
workshop, e.g. at an authorized Mercedes-Benz Center.
Observe the notes in the "Changing a wheel"
sec ...
Attaching the roof carrier
Secure the roof carrier to the roof rails.
Observe the manufacturer's installation instructions.
...
Panic alarm
► To activate: press
button 1 for at
least one second.
An alarm sounds and the exterior lighting
flashes.
► To deactivate: press
button 1 again.
or
► Insert the SmartKe ...
