Do not use a pointed object such as a screwdriver to open the cover in the dashboard. You could damage the dashboard or the cover.
Make sure that no moisture can enter the fuse box when the cover is open.
When closing the cover, make sure that it is lying correctly on the fuse box. Moisture seeping in or dirt could otherwise impair the operation of the fuses.

► Open the driver's door.
► To
open
: pull cover 1 outwards in the direction of the arrow and remove it.
► To
close
: clip in cover 1 on the front of the dashboard.
► Fold cover 1 inwards until it engages.
Useful information
This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
...
Notes on technical data
The data stated here specifically refers to
a vehicle with standard equipment. Consult
an authorized Mercedes-Benz Center for
the data for all vehicle variants and trim
levels. ...
ATA (anti-theft alarm system)
► To arm: lock the vehicle with the
SmartKey.
Indicator lamp 1 flashes. The alarm
system is armed after approximately
15 seconds.
► To deactivate: unlock the vehicle with the
S ...