Just joined site today, I had a tapping in the rear and after removing everything out of the boot, strapping up seat belts and removing security cover, it was still there. Got my son in back and went for drive he said the noise was low in corner on o/s/r. So removed lift up cover and the large plastic storage box. Thought I had found the problem at first as wiring loom was up against the deep storage pockets, so put some sponge round these at both sides. The noise was still there on another run, the noise was alot clearer now. After feeling around in the holes in the rear panel, I pulled out a large plastic trim that was loose from the rear of the wheel well. I checked the n/s/r and that was the same. I had to remove the deep storage boxes in the rear to refit the plastic trims (with the added security of a bit of silicone) noise now gone. 6 months old but do not trust dealers with trim.