I have lifted up the aluminum channel and found a small pucker in the molding between the metal and the rubber almost right above the wet spot. I have drilled a couple of holes in the sheet metal inside half expecting water to come out and didn't get any.

I am going to attempt a repair before I take out the glass. I know how heavy and relatively how fragile they are.

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85 Merc 300D - Unwinding 31 years of wear
86 VW TD
Mahindra Diesel
Iseki Diesel

In 2007 I didn't own a diesel.