where is the leak this time? same place? sometimes around the windows they leak, i saw my mechanic fix this on a 328ci and it looked pretty easy, something to do with the window not aligning properly all the time, but once you open the door and then close it, it appears to be all ok, check that first, secondly im gonna state the obvious and ask if you notice any holes in the top (even the smallest, may not be able to pick it up with your eye) lastly check the seal around the top of the windshield, that could stillbe the problem or the problem again.
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