VPM-

You may want to make sure that the roof is sliding freely. The sunroof rails , I have read, are at least part of the problem if the motor eats the gear.

In other words, replacing the motor/gear may not solve the problem and the gear will get eaten up again

I'd be real interested to hear how you do.

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Patrick Leber
'84 190E 2.3
'83 Porsche 944 (track car)
'84 Porsche 944 (parts car)
85.5 Porsche 944 (sled)