My wheels are not too dirty. I do clean my car once a week. The squeal only happens at specific pressure on the brake coming to a stop. I have condidered doing a coating on them as JMAN111 mentioned.
I called BMW and demanded them to look into this again, we are going today for a ride with the service manager so he can record it, and send it to "BMW" on what to do. I will keep you guys posted.
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