[KevinH1990]

This thread and the links within it provided the information I was missing. The symptoms I was experiencing included:
1. Passenger window did not drop when I pulled the inside or outside handle.
2. The door lock would turn on and off at random while I drove.
3. When I locked the car using the key fob, I would hear a "double beep" but the car would lock.

My research pointed to the microswitch attached to the exterior door handle. I replace that microswitch yesterday. I reset the window by rolling it all the way up and all the way down and holding each position for 10 seconds. This solved the problem with the window failing to drop when I used the outside door handle. (For some reason that I cannot explain, I have not yet tested the inside handle.)

When I locked the car, I heard the "double beep" but it seemed to take longer to sound. I estimate that it required about 20 seconds.

When I was fumbling around inside the door, the window would drop and the car would beep when I touched the door latch mechanism. (The first time this happened was when I connected the cable from the door handle microswitch to the door latcch. Because I couldn't see exactly which part I was touching, I cannot tell what caused the window to drop.

My current thinking is that the microswitch in the door latch and possibly the solder joints in the door latch are the problem. I have the following questions:

1. Does this sound plausible?
2. If I take the assembly out, I'd like to replace the microswitch and reflow the solder in the possibly defective joints. Does this sound like a good tactic?
3. Does anyone know the part number for the door latch microswitch?
4. I cannot replace the microswitch and I need to replace the entire latch mechanism, does anyone know the part number for the passenger-side VW part?

Thanks again for posting this information and thanks in advance for any assistance.