Are you sure about the window not leaking? If the window leaks it may be going down between the outside and inside walls under the window next to the driver's seat. The window has a small drain slit that can get clogged up. If so the window gutter will overflow and water will leak either on the wall next to it or in the interior of the wall. Mine went on the inside of the wall so we were able to see it and blow out the drain hole before we had damage.
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