If I were you, I'd look closely at the tracks where the sunroof mechanisms slide. Make sure there is no debris and nothing blocking the window. If you've already done so, if the window still functions, try performing the intitialize/teach procedure I found in the service manual. If neither of these works, you will need to get it to a dealer. There may be a problem with the sunroof limit switches, or the motor, or the track.
I hope this works. Stay dry
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Sunroof Motor/Actuator Initialization/Teach Process (Existing Motor)
Perform the Initialization/Teach Procedure any time the sunroof motor/actuator is removed from the sunroof.
Important: The Initialization/Teach Procedure is not complete if any of the following actions take place before the initialization cycle is done: