I just had two new front tires put on my '91 318is and when I got the car back I noticed a new noise coming from the brakes. The first time the brakes are used, after the car has been sitting, there is a loud click/clunk noise from the front end. It only happens the first time they are used, and work fine after that. It's driving me crazy, especially since I paid to get tires mounted and now something is screwy. I'm sure it's something small, does anyone have recommendations?