First read and observe the introductory information
and safety warnings
The roll-back function for the electric windows can reduce the risk of injuries when the windows are closing . If the one-touch closing function for a window does not work because it is stiff or is being obstructed, the window will automatically open again.
Closing the window without the roll-back function

WARNING
The roll-back function is also activated if the windows are closed using the vehicle key for convenience closing .
Electric windows – functionsFrequently asked questions
If you suspect that there is a fault in the vehicle or if your vehicle has
been damaged, read and observe the following information before
contacting a Volkswagen dealership or qualified workshop. You may also find
useful information in the index under the headings Things to note or Checklist. ...
A/C System, Operating after Charging
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.
...
Wires with Cross Section up to 0.35 mm 2,
Repairing
Special tools and workshop equipment
required
Crimping Pliers - .35-2.5mm -VAS1978/1A-
Wiring Harness Repair - Crimping Head - .35-2.5mm
-VAS1978/1-1-
When repairing wires with a cross- ...