Ross:
I don't know where you access it from but, another place to look for resolution----from each side look down and see if the top bows are still tightly bolted to the car which if loose, causes partial lift.
There have been owners that found the nuts loosened on one side when theior top only went up
part way. Here's what I found:
"It was nighttime; I was putting the top down when I heard a “pop”… and the left side of the roof suddenly grinded to a slow crawl. I finished putting it down by hand, and fell into auto-induced state of depression.
Afterwards, I had to “help” the left side back up to its closing position. The next time I tried to lower the roof, it jammed!
Seems that 1 loose nut allowed a bracket to slip out of its mounting point on the left hydraulic cylinder. The bracket then jammed against the hydraulic cylinder… potentially breaking it from its mounting point.
I unsnapped the liner and the wayward bracket was found, the hydraulic cylinder was gently raised (using the “top up” button), and the bracket slowly popped back into place. Then, the loose nut was tightened with an adjustable wrench."
While inside, we checked that the other nut was tight… and were relieved to discover it was fine.