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 gas discharge bulb control unit -J343-/-J344-
WARNING
Risk of death due to high voltage! Risk of injury
and environmental pollution!
Observe operation and safety notes for gas discharge
bulbs
→ Chapte ...
Operation and safety notes for gas discharge bulbs
Note
Never change bulbs if you are not familiar with the
appropriate procedures, safety precautions or tools.
WARNING
Risk of death due to high voltage.
...
O-ring
Use only O-rings that are resistant to refrigerant R134a and
related refrigerant oils. O-rings are no longer colour-coded.
Coloured and black O-rings are used.
Check that the O-rings used have the correct internal
diameters.
...