Mine has been rattling off and on since I've had it. Both my dealer and I have adjusted the bumpers and this stops the rattling for a time, then it returns. Well at least the problem is consistent. Normally when adjusting the bumpers I try to keep the bumper bottoms parallel to the hatch recess but since this doesn't fix the rattle long term I tried something different the other day. I pivoted the bumpers slightly so that the bottoms were rotated towards the front of the car. The single retaining screw and sloppy fit of the alignment pin allows enough motion to do this. So far this has worked and I only now hear a rattle when I hit a really big bump or drive over an uneven surface that causes the whole car to flex (think turning into a driveway with a slight gradient). Will have to go another couple of weeks or so to see how well this latest adjustment hold up.