Well I had a quick look tonight, but it doesn't seem to be the door. I'll have to investigate further. I already patched up some rust behind the battery and in the cowl drain area when I first bought the car, so I don't think that's the issue. Maybe it's the windshield seal. Anyhow this weekend I'll do some pouring experiments and see what's going on.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL