The areas for
checking the leak are the window channels, the grooves which the
glass slides in, are fully in place to the top of the window frame; The
glass is sitting in the window channels squarely, adjustment can usually be made on the
glass retainers behind the doors trim panel; The door aperture seal is correctly fitted and in good condition, the aperture seal is the usually rubber tube like affair fitted to the door aperature and which the door closes
against.