Using seat belts :

Check the condition of all seat belts regularly.

Keep the seat belts clean.

Avoid allowing any foreign bodies or fluids to get on to the seat belt or latch plate or into the slot for the seat belt buckle.

Do not trap or damage the seat belt and latch plate, for example when closing the door.

Never remove, modify or repair the seat belt or any part of the belt fixture system.

Always fasten the seat belt correctly before every journey and keep it fastened while the vehicle is in motion.
Twisted seat belt
If it is difficult to remove the seat belt from the belt guide, the seat belt may have become twisted if it was returned too quickly into the side trim:
Fasten the seat belt even if you are unable to undo the twist. However, the twist should not be in part of the seat belt that comes into direct contact with the body. The twist should be corrected immediately by a qualified workshop.

WARNING
Using seat belts
Fastening and unfastening seat beltsVarious securing systems
Fig. 62 On the rear seats: figure Ⓐ illustrates
the main securing points for the child restraint system on the lower retaining rings
and top tether. Figure Ⓑ shows how to secure a child restraint system using the
vehicle's seat belt
First read and observe the introductory information
a ...
Luggage compartment cover
Fig. 84 Open tailgate: raised luggage
compartment cover
Fig. 85 Behind the rear backrest: stowed
luggage compartment cover
First read and observe the introductory information
and safety warnings
When the tailgate is opened and closed, the luggage compartment cover is also
raised and low ...
Test after driving for 10 minutes
First read and observe the introductory
information and safety warnings
Reconnect the tyre filler hose and check the tyre pressure on the tyre
pressure display ⑥.
1.3 bar (19 psi / 130 kPA) and lower:
Do not drive on! The tyre cannot be sealed adequately
with the breakdown set.
...