A. Yes.
B. A lot if you pay someone to do it.

I have two X5's with pano roofs. I have not unplugged them, but have asked the family not to use them. I do crack them open now and then to clean drains. I also need to replace the sunroof seal (BMW Part# ?) to reduce road noise and remove sunshades to re-cover missing fabric.

I actually pulled a headliner and pano roof cassette out of a junkyard with the plan of figuring one out, and preparing to rebuild it. It is a disaster with a lot of plastic. No way..