Using seat belts :

Check the condition of all seat belts regularly.

Keep the seat belts clean.

Never let any foreign bodies and liquids get on to the seat belt, the 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 beltsRemoving and installing charge air cooling pump -V188-
Special tools and workshop equipment
required
Hose clamps up to 25 mm -3094-
Drip tray for workshop hoist -VAS 6208-
...
Vibration, conducting a road test before balancing wheels
If a customer brings a vehicle to the workshop complaining
about “vibration”, a road test is essential prior to balancing
the wheels.
This will give you information about the nature of the
vibration.
...
Running-in
First read and observe the introductory information
and safety warnings Please follow the regulations concerning running-in new
parts.
Running in a new engine
Any new engine has to be run in during the first 1,500 kilometres. During its
first few hours of running, the internal friction in ...