A creak or squeak can be heard from the top of the front or rear doors. This noise is most notable when the windows are fully up. The noise is caused by the decay of the flocking material on the door seals. New door seals, Teflon tape, special lube, or a combination of all of these may be needed to eliminate the noise.Google+
Car Problem Reports
BMW 530i Noise From Top of Front/Rear Doors When Windows Are Fully Up
BMW 530i Problem
Model Year Affected: 2004
Average Mileage: 75,500 mi (32,000 mi - 135,000 mi)
Visitor, 2004 BMW 530i, 135,000 mi
same problems, since 20 some thousand miles.. I have used silicone spray, it helped a little, but problem comes back.
Creaking as if the car is flexing on uneven pavement at highway speeds.