First read and observe the introductory information
and safety warnings 
Volkswagen recommends the use of genuine Volkswagen spray with lubricating and anti-corrosive properties to de-ice the lock cylinders.

NOTICE
Care of rubber seals
UndersealRemoving and installing sill panel moulding, 4-door model
Note
Removal and installation are described for the left vehicle
side. Follow same instructions for the right side as
appropriate.
Special tools and workshop equipment
required
...
Removing and installing parking aid control unit -J446-, RHD vehicle
Note
When renewing the control unit, select
Renew function for the respective control unit in
Guided fault finding or
Guided functions mode
→ Vehicle
diagnostic tester.
Removing
â ...
Test prerequisites
Check wheel suspension, wheel bearing assembly and steering
for excessive play and damage.
Tread depth difference of no more than 2 mm on one axle.
Tyres inflated to correct pressures.
...