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.
Make sure that all objects in the vehicle are stowed correctly, and that they cannot enter the driver's footwell. Install the floormats securely and as specified in order to ensure sufficient clearance for the pedals. Do not use loose floormats.

Floormat on the driver's side (example)
■ Driver's seat/front-passenger seat: slide the respective seat back.
■ Rear seats: slide the respective seat forwards.
■ To install: place the floormat in the footwell.
■ Press studs 1 onto retainers 2.
■ To remove: pull the floormat from retainers 2.
■ Remove the floormat.
Automatic transmission
Important safety notes
WARNING
If the engine speed is above the idling speed
and you engage transmission position D or
R, the vehicle could pull away suddenly. There
is a risk of an accident.
...
Seats
Important safety notes
WARNING
In order to avoid possible loss of vehicle
control, all seat, head restraint, steering
wheel and rear view mirror adjustments, as
well as fastening of seat belts, ...
Qualified specialist workshop
An authorized Mercedes-Benz Center is a
qualified specialist workshop. It has the
necessary specialist knowledge, tools and
qualifications to correctly carry out the work
required on your vehicle. ...