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
UndersealTechnical Requirements
Factory-Installed Trailer Hitch
If the vehicle was already delivered from the factory with a
trailer hitch, all of the technical and legal requirements for
towing a trailer have already been taken into account.
Note that a »13-pin« trailer ...
Two-Part HS Hardener
Definition:
Two-Part HS Hardener -LHA 009 041 A3-
Two-Part HS Hardener, Short -LHA 021 004 A3-
Two-Part HS Hardener, Extra Short -LHA 009 046 A2-
Two-Part HS Hard ...
Fender Corrosion Repair Measures, in Wheel Housing Liner Contact Area
Note
The corrosion protection in the fender seam must be applied on all
replacement parts, on which the attached seal is not already present.
The additional corrosion protection seal will prevent “chafe marks”
in the fender wheel housing liner.
...