Nope - I can't get at the bolts that hold the glass to the regulator, since the window is at the very bottom of its travel. And I'd rather not cut the regulator cables until I'm sure the regulator is bad. I checked, and yes, the front of the window is definitely still in the track, which surprised me.

Your idea to remove the top two bolts and collapse the regulator sounds like it's worth a try. I'll look into that tomorrow. Thanks.

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2003 X5 4.4i
1992 Porsche 968
2007 328i
2014 Subaru Forester XT