First read and observe the introductory information and safety warnings
The underside of the vehicle is coated to protect it from corrosion and damage. The protective coating on the underside of the vehicle could be damaged when driving. Volkswagen recommends therefore that the protective coating on the underside of the vehicle and on the running gear should be checked regularly and repaired if necessary.
CAUTION
Underseal and anti-corrosion coatings can ignite on the hot exhaust system or on other hot engine parts.Volkswagen Touran Service Manual. Flat Spots, Correcting
Flat Spots, Correcting
Flat spots cannot be removed from tires with workshop
equipment.
Such flat spots can be "driven out" only by driving the car
until the tires are warm.
...
Volkswagen Touran Service Manual. Tires, Dismounting, Wheels without and with Tire Pressure Monitoring System
If equipped check the tire pressure monitoring sensor with
the vehicle diagnostic tester and if necessary replace.
Note
When cleaning disc wheel (rim), the tire pressure monitoring
sensor (if equipped) must not come into c ...