I think the subject says it all. I have had four different loaners with pano roofs so far. And none have worked. One would open to vent, but nothing happened when I tried opening further. One would open to about 50% and then stop. The 3rd would open and close successfully to all positions...while dumping water all over you. The latest one, which I picked up today, does absolutely nothing when the controls are put in any position. I am glad I ordered mine without the roof. I can't imagine this is the norm, but are the loaner cars where cars with broken pano roofs end up? Today's car has a really low VIN, and one rear door handle does not retract (or the ability to open the door) as well. I am having terrible luck with loaners so far!