Another W124 Rear window thread

[indybenz]

So I've spent some hours researching (several reliable Benz forums) and testing with a mulitmeter. Perhaps my answer is already out there but I could not find it.

Here are the facts:

1. W124 UK RHD 300TD Estate (non-turbo wagon) auto transmission, owned by me since June 2015.
2. As of today, window switches all operate with the KEY OUT OF THE IGNITION. That's a new one on me.
3. Laser line alarm removed many moons ago as it was causing all kinds of problems.
4. Console switches test ok and I can hear the convenience relay clicking when I engage the switches for the rear windows
5. Driver's (starboard side) rear window:
-no broken wires in door: I checked
-console switch engages convenience relay
-it used to go up and down, then eventually was failing intermittently, now not at all
6. Passenger (port side) rear window:
-motor engages with console switch, not door switch.
-probably regulator or something else broken/dislodged (but that is a separate issue from the power issue that I'd like to sort first)
7. Fuses checked several times and all are ok.
8. Both rear windows are getting 12 volts to the switches and the switches work when plugged into other recepticle thingies.

I'm stumped at this point.

Ideas? Insights? Thank you.