I would try to re-sync the sunroof switch. With the sunroof in the vent position (closed with the rear of the sunroof up) push up on the sunroof switch for 5-6 seconds with the key in position 2.

Does the sunroof stop moving if you release the switch?

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Ray
1998 Mercedes E320, 200K Miles
2001 Acura 3.2TL, 178K Miles
1992 Chevy Astro, 205K Miles