Hello all you, i have had brake problems with my bmw sense it was new. the service department at the dealership has had it in for the brakes about 5 times and they can't seem to fix it. the anti-lock brake turn on for reason and at the wrong time. it's actually been dangerous at times. also at a recent check up at a independent shop they discoverd a leak at the rear main seal. this is a huge problem. is any one else having problems??