I fitted a towbar to mine a few weeks ago. There are a couple of screws in each wheel arch, 2 under the lower lip and then you have to get access below the light clusters through the trim inside the boot. Below the lights there are 3 nuts each side that need to be removed. These are quite low down, I managed to just move the trim away enough to get my arm in to undo the nuts. Mine has also got the sub-woofer/bass unit on the rh side which had to come out. A bit tight that one.........