First read and observe the introductory
information and safety warnings
Cleaning steel wheels
Use an industrial cleaner to remove brake dust. Steel wheels should therefore be cleaned regularly with a separate sponge.
Any damage to the paint on steel wheels should be touched up before the metal starts to rust.
Caring for and cleaning alloy wheels
Wash grit and brake dust from alloy wheels approximately every two weeks. Then use an acid-free detergent to clean the wheels. Volkswagen recommends applying a hard wax compound to the wheels every three months.
It is important to remove road salt and brake dust by washing the wheels at regular intervals, otherwise the finish will be impaired.
Always use an acid-free detergent for alloy wheels. Car polish or other abrasive agents should not be used on the wheels.
If the protective coating is damaged, e.g. by stone impact, the damaged area should be repaired immediately.
Cleaning and caring for chrome and aluminium trim parts
Care of rubber sealsVolkswagen Touran Service Manual. Safety Precautions
Caution
Risk of damaging the battery cells at too high of
drying temperatures!
Observe the maximum drying time of 30 minutes at a
drying temperature of +80 C (176 F).
...
Volkswagen Touran Service Manual. Tires, Rolling Noises, General Information
Rolling noise perceived by the human ear is caused by
vibrations transmitted from the noise source to the ear via the
air.
Here we are interested in noises created by certain
characteristics of the tires as well as the effects of rolling ...