Hello, I've noticed that theres coming knocking noise from the back when going over speed bumbs. You can also hear small knocking noises when going low speeds over small pot holes or such. I've been inside the trunk and put pressure on the boot and I can confirm it doesnt come from the rearshocks. Its like golfball bouncing in the sparewheel mount. Havent found any objects that doesn't belong in the trunk though. Any ideas? Its really getting annoying..