I heard a cracking and the drivers window is now loose from it's mount. I removed the door panel and see a broken plastic curved shield piece in the bottom and the rubber under the window is flopping around at the rear end.

What is the R&R Procedure and what parts are normally needed/recommended?

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Steve
1985 Mercedes 500SL Euro (Gray market)
1995 BMW 520i Euro (Gray market)
1992 BMW 525it Wagon
1994 Honda Del Sol Si