Hi, I have a clicking noise, like click, click, click, only when the car is moving. That is when the tyres are rolling or i am driving or slowing down. When i am in neutral and accelerate, no problem. Sounds like metal on metal. And it gets faster, the faster the car rolls. I have sent it to many bmw mechanics, all said it was a bent rear wheel. Repaired, problem still persists. Any help will be appreciated. 2006 bmw 650 i convertible with 19 inch standard rims with bridgstone run flats.