Volkswagen Touran Service Manual: Specifications for Retrofitting Wheel and Tire Combinations (Documents)

Wheel  and Tire Guide Information

...

Legal Requirements

The manufacturer is granted general type approval for the whole vehicle including all parts and for specific retrofitting (general type approval according to 20 StVZ ...

Other materials:

Volkswagen Touran Service Manual. Tire Sealant, Removing
  Place the wheel on a flat surface.   Remove the valve insert.   Caution Tire sealant is harmful to health. eye and skin irritatio ...

Volkswagen Touran Service Manual. Single Wire Seals, Installing
  Note Single wire seals prevent the penetration of water and dirt into the contact housing. They are installed, for example, in the engine compartment and must be reinstalled after a repair. Single wire seal is crimpe ...