First read and observe the introductory information
and safety warnings
The underside of the vehicle is coated to protect it from corrosion and damage. The protective coating on the underside of the vehicle could be damaged when driving. Volkswagen therefore recommends that the protective coating on the underside of the vehicle and on the running gear should be checked regularly and repaired if necessary.

CAUTION
De-icing door lock cylinders
Cleaning the engine compartmentLong-Term Underbody Protection -D 314 D37 M2-, Black
Definition:
Long-Term Underbody Protection -D 314 D37 M2-, Black
Edition 02/2010
Product description of Long-Term Underbody Protection -D 314
D37 M2-, Black
Long-Term Underbo ...
Test Requirements
Radiator and condenser are clean (clean if necessary).
The ribbed belt for the A/C compressor and alternator
tensioned correctly.
All air ducts, covers and seals are OK and installed
correctly.
...
Discharge Refrigerant Circuit with A/C Service Station
Caution
If it is suspected that chemicals were added to the
refrigerant circuit to seal leaks, do not connect the
A/C service station and do not extract the refrigerant.
...