Well, to update on my car (85' 380SE) the new antenna seal. I never knew how much water was in there, but I know it was damp and as you can see in the above photo, the seal was tattered. I had water in my right rear floor panel. Ironically, when I replaced this seal, water stopped coming in the right rear floor. Strange, but somehow the water was flowing over there.

I still have a little bit of water coming from one taillamp, which I will tend to soon.

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2004 Toyota Sequoia Limited 4wd
1991 Lincoln Town Car Executive
1991 Cadillac Sedan DeVille
1988 Mercedes 300SEL
1972 Chevrolet Caprice Kingswood Estate 9-passenger wagon
1973 Pontiac Grand Ville
(Prior MB's: 1974 240D, 1985 380SE, 1984 190D, 1993 400SEL)