Just bought an '85 245 DL for 0, a project car for the eventual use of my son. Engine, transmission, suspension, body are sound, lots of niggling problems from benign neglect. Car was not driven for a few years until recently. Has third row seat: when lifted seat up, found water pooled underneath. I can see no source / cause of leakeage to allow water to enter; could it somehow have seeped in through a weak rear door / tailgate seal? Headliner looks like new, no stain or moisture. Baffled...