Does anyone have any experience with the corrugated rubber hose that surrounds the vacuum lines and electrical wires passing from the body to the front doors? These are both torn on my 300D and I'm wondering if the water on the passenger side front floor can be getting in thru that way. Have checked the drain points under the hood and under the battery plate. All seems ok in those places. Where do the front drains for the sun roof pass down thru body and where are the exits? This could also possibly be the problem. Windshield gasket seems to be quite pliable so am hoping it is not the cause.

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1961 190Db retired
1968 220D/8 325,000
1983 300D 164,150