Hi. Has anyone else had this problem? I seem to have picked up what sounds like a small piece of gravel, and every time I take a corner, it rattles all the way along the car from one side to the other. It sounds like it is somewhere behind the back seat. I've done the obvious of looking in the boot to make sure there is nothing there (and anyway, if there was, it wouldn't make the same sound, as the boot is lined with carpet, and this is the sound of a stone rattling against metal). The alternative I suppose is that something has broken off inside, but the car is showing no signs of any distress.