Door window drops but immediately jumps back up

[bugman]

Just to update any curious window fixers, the removal of the plastic coating and liberal oiling has finally fixed the problem.

[Jaxonalden]

I had the same problem and swapped out the drivers door lock assembly. I did some investigating and found the micro-switch that works the window drop with the door handle. The switch is below the lock and upside down and I found that the switch (with a plastic plunger) was dirty and didn't have any lube on it and was worn to a point that it didn't operated the micro-switch.

I'm now going to keep the mechanism clean and lithium grease applied to those contact points.

[MN 986]

My window drop-down feature stopped working today. Do you think I need to replace my door lock assembly, or lubricate the existing one?
If I need to replace it, do I need to do anything with the key, or is that a separate part?
Thanks.

[bugman]

The lock assembly is a serparate item, so no need to change it.
I found that there is an equivalent VW item that fits on a Jetta.
The latch assembly is actually of French origin (the manufacturer's name is on the side) so it could be cheaper to find one from this source than OEM.

Mine is still working fine after removal of the plastic coating! Good luck