My 545 lost braking power last week Friday. I took it to Rheinland Import Service in Snellville, GA (Gwinnett) as they've done work on it before. I was thinking air got in the brake lines as that's what happened on an older car I had previously. They inspected the car and saw that the issue I was having was under recall. They got me the SIB and I got it done at the dealer at no cost. They didn't even charge me for the time they spent on checking it out. So if you're looking for a shop I highly recommend them.