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.
Floormats
WARNING
Objects in the driver's footwell can restrict the
pedal travel or obstruct a depressed pedal.
The operating and road safety of the vehicle
is jeopardized. There is a risk of an accident. ...
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
...
Service and literature
Your vehicle is covered under the terms of the
warranties printed in the Service and
Warranty Information booklet. Your
authorized Mercedes-Benz Center will
exchange or repair any defective parts
...