My Z4M makes a clicking noise when coasting at low speeds. The noise goes away the moment I touch the gas or the brakes. Its not like the gear rattle sound heard in neutral sometimes (which is normal from what I'm told) but is a continuous rapid clicking sound (couple of clicks per sec). Its not loud but is noticeable when I'm in an enclosed space like a garage. Does this sound normal? Its an 06 with only 12k miles. I bought the car recently and still getting used to it so definitely appreciate any responses!