Hmmm. I agree with Randall. It sounds like you have done everything to solve the problem that you can do.
I had issues with mine a few weeks ago and so I took the door lock out of the drivers door and looked at it for anything I could see out of line. These mechanisms are too well sealed up to inspect for any breakage so I ordered a new part.
Well, guess what? That part came yesterday and I spent the evening out in my garage taking the door off and replacing it with the new part. This should have only taken 30 minutes or so but when I put the new part in ...... ta da - It didnt work at all. No response from the window at all and the door was not locking like it should. I tried resetting the windows and following the Bentley manual but no luck. I took it out and compared it to the old one and there were a few things that looked a little different but nothing major. When I say a little different, I mean some of the markings were not the same and stuff like that.
So I put the new one back in again. Keep in mind that you have to hook everything back up to make sure the door handle in and out work right?? Still not working. At least my old unit would work on occasion. This new one was not working with the locks or the window drop at all.
So I looked at the original unit and put it back in and guess what???? Door lock and windows all work like they should. I wonder now if it is a microswitch in the convertible top? Could that be a possibility??
Anyways that is why it took me all night and now I have an extra door lock mechanism. I will keep it for later.
I know someday I will need it.