my guess would be a door lock line has been pulled loose. one problem with 20yo rubber bits is that they harden and crack...you may have broken a brittle elbow somewhere.

besides, you need a mityvac anyway...

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1973 280 - Current Project Car
1979 240d - 100% Stock
1982 380sl - 100% Stock
1985 190e 2.3 - Heavily Modified