Please note the following for the cleaning and maintenance of the seat covers :

Before getting into the vehicle, close all Velcro fasteners that could touch the cloth seat covers and fabric trims. Open Velcro fasteners can cause damage to cloth seat covers and fabric trims.

Avoid the direct contact of sharp-edged items and applications to the upholstery and fabric trims in order to prevent damage. Applications are for example zips, studs, rhinestones on clothing or belts.

Dust and grit in the pores and seams should be removed regularly so that no permanent damage is caused to the surface of the seats by scratching.

Always check whether garments are colourfast to prevent damage to the upholstery. This is especially important for light-coloured upholstery.

NOTICE
Volkswagen recommends that stained upholstery is cleaned by a specialist company.
Handling of seat covers
Cleaning cloth seat covers, fabric trim and Alcantara® upholsteryVolkswagen Touran Owners Manual. Cleaning seat belts
First read and observe the introductory
information and safety warnings The automatic belt will not be able to
roll back properly if there is dirt on the belt and thus prevent the seat belt
from working properly.
The seat belts must never be removed for cleaning purposes.
Remove dirt ...
Volkswagen Touran Service Manual. Valve, Removing and Installing, Rubber Valve
Make sure wheel rim is clean.
Using the Valve Fitting Tool Valve Fitting Tool -VAS6459--1-,
insert a new tire valve.
Remove the valve insert.
...