My driver's side rear window does that. I guess I'd better fix it but something like that is way down on my list of priorities, unless it fails completely, like the rear window on the bimmer did. Having to drive around with a trashbag taped over your window at 65mph makes you want to fix it really badly.

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Seth

1984 300D 225K
1985 300D Donor body
1985 300D Turbo 165K. Totaled. Donor Engine. It runs!!!
1980 300SD 311K My New Baby.
1979 BMW 633csi 62K+++? Dead odo