I have a new X335i, which i am very happy with. however, I am ocd about rattles and the like.
There is distant mid-frequency rattle from outside the cabin (sounds like coming from engine bay or under the car around the drivers side) that i hear at low speeds, especially as i slow to a stop or less so as i start out. It occurs as I am slowing, but i can also hear it a bit after stopping, so not in the drive train. I suspect something is knocking against something else and the engine or other components resonate at just the right frequency at lower rpms to make the sound. Don't hear it once i get up to speed. Not real loud, but its just "there", enough that i am now very aware of it when it occurs.
Anyway, i'll have to go to the service center, hopefully convince them i'm not crazy (my wife always thinks i am when i complain about this sort of thing) and see if they can figure this one out.
Anybody have anything similar?