It may be the "Opera Windows" when I bought my 96 DI the windows had some rot around them (3 small holes on the driver side) and water was entering directly into the truck. When I opened up the back I found the sponge and carpet where water logged I mean really soaked. A couple of liters is nothing compared to what I had in there.
Anyway I filled the holes and left the sponge and carpet out of the rear. And I haven't noticed any water or moisture back there since.
And we have had plenty of rain up here.
Anyway I hope you find the cause of the "unwanted water."
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98' D1 V8i
96' D1 5-Speed (SOLD)
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