My E64 had this problem and silicone fixed it for about 6mths at a time. My F12 and my buddy's F12 have horrible squeaking to the point where I'm not sure if passer's by are admiring the car, or wondering why I would purchase my brakes for such a high end car from wal-mart. The truth is 95% of people don't know that this happens with high performance brakes, but it's also annoying for us as drivers as well. I'll try the silicone on it when I get a chance and post the results. I've also been told dealer's can't do much. The best solution for the squeaking to go away is to opt for the B/O sound system.
Watch out for emergency vehicles, you won't hear them
