CITROEN DS3 Owner's Handbook Manual page 103

Mats
Removable carpet protection component.
Fitting
When fitting the mat for the first time, on the
driver's side, use only the fixings provided in
the wallet attached.
The other mats are simply placed on the
carpet.
Removal
To remove the mat on the driver's side:
move the seat as far back as possible,
unclip the fixings,
remove the mat.
Refitting
To refit the mat on the driver's side:
position the mat correctly,
refit the fixings by pressing,
check that the mat is secured correctly.
Fittings
To avoid any risk of jamming of the
pedals:
- only use mats which are suited to
the fixings already present in the
vehicle; their use is essential,
- never fit one mat on top of another.