Hi all, new Mini owner here. I just purchased an 07 Cooper S a few weeks ago and I am thoroughly enjoying it, I do have one issue that I can't sem to track down. From behind the tach in the dash there is a flopping/knocking noise, if I pop the hood I can sort of hear it from the same firewall area. It only happens at idle if any throttle is applied or even rolling down the road it does not happen, I have searched google quite a bit and cannot seem to find anyone with the same issue. any body experience this? thanks for the help in advance.