Thanks wpoll and X5only! The controller is exactly as pictured in wpoll’s link. I just popped out the light module using a plastic trim tool from the rear facing side, same with the motion sensor module, which revealed two small torx screws behind each of those sections holding the panel in.

Once I replaced the controller I was able to operate the sunshade (the most essential part I needed to get working). Unfortunately after I held the button down to run the initializatuon process, there was loud grinding from the motor as it tried to move the actual moonroof.

I’ll post video tomorrow morning to see if anyone has had a similar experience and can identify the issue from the sound but I suspect the whole glass pane movement chain/cable mechanism is shot or seized since when I removed the motor the gear on the motor looked ok (though I don’t know for sure what a known good gear looks like).

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