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The sunroof on my 745 was leaking a little water into the interior, but the drains were clean. A little investigation showed the water was wicking under the front cover for the sunroof mechanism. The area around the tubes which the cables run in is supposed to be filled with plumbers putty. The before pictures below show the area which needs to be caulked.


I carefully filled the area with plumbers putty, just enough to contact the cover for the cable tubes. After several days of rain the car is dry inside.
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john
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