Just going to jump in here and share my experience with my inoperative top. After my layman's approach didn't uncover the cause I cried "uncle". Took my car to a recommended European repair shop. Dropped it off on Monday afternoon. Picked it up Wednesday afternoon. It just pays to have the right diagnostic tools to verify the top system is working right. Tom of Benz and Beemer in New Baltimore, Michigan traced the problem to a broken arm on the tonneau cylinder. Both my sensor switches checked out OK. Here's a short video showing this broken lever to the micro switch. In my case someone had sat on the tonneau cover apparently putting too much pressure on that part.

https://share.icloud.com/photos/0z73...inton_Township

Good luck on your hunt!

Regards,