First read and observe the introductory
information and safety warnings 
Repairs and modifications must always be carried out according to Volkswagen specifications  !
Modifications and repairs to the front bumper, the doors, the front seats, the roof or the bodywork should be carried out by a qualified workshop. System components and airbag system sensors could be located on these vehicle parts.
If you work on the airbag system or remove and install parts of the system when performing other repair work, parts of the airbag system may be damaged. The consequence may be that, in the event of an accident, the airbag inflates incorrectly or does not inflate at all.
So that the effectiveness of the airbags is not reduced and that removed parts do not cause any injuries or environmental pollution, regulations must be observed. Qualified workshops are familiar with these requirements.
Any modifications to the vehicle's suspension could prevent the airbag system from working properly during a collision. For example, using tyre/rim combinations which have not been approved by Volkswagen, lowering the vehicle, making modifications to the suspension rate including work on the springs, struts and shock absorbers could cause the forces which are measured by the airbag sensors and sent to the electronic control unit to change. Some changes to the suspension could cause the forces measured by the sensors to increase. This could lead to the airbag system being triggered in collision scenarios where it normally would not be triggered if modifications to the suspension had not been made. Other modifications could cause the forces measured by the sensors to decrease therefore preventing the airbag system from being triggered when it should have been.
WARNING
WARNING
Volkswagen Touran Owners Manual. Side view
Fig. 1 Overview of the driver side
Key for  :
Roof aerial
Door release lever
Roof railing
Exterior mirrors  
Additional turn signal light
Surround lighting
Sensors for the Park Assist system  
The jacking points
Tank flap
Side window integrated ...
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 ...