The sunroof on my 1994 Q45 is stuck shut, but I can still hear the motor. Just prior to that, it had a tendency to stop 3 inches before closing. I'd have to tap down the wind deflector to complete the cycle.

Will that wench tool mentioned in the owners manual open it?

After I get it open, would it help to just remove the wind deflector, and is that easy to do?

No! It is all about keeping the rails clean and lubricated, the seals preserved and the drains open.