It's pretty simple. You just need to detach (ideally remove) the rear wheel arch liners (a couple of screws attach them to the car body and the bumper itself.
You need to remove the nut behind the top corner (one each side) of the bumper. There's a round plastic wheel - with a concentric bolt poking through it - which you can rotate to raise or lower the bolt and therefore the bumper height at that corner.
Garagiste alert: By now the bolt will be rusted solid to the nut so when you undo it, the wheel will rotate, or the bolt itself will rotate inside the wheel so you might have to cut the nut/bolt off with a Dremel. I would buy new parts to fit (grease them up too) so that they remain serviceable.
By rotating the wheel that may be enough to line up the bumper and Robert is your mother's brother.. but if you want to remove the bumper altogether, there are three bolts on the rear of the car / inside the boot shut. That's it really... 5 bolts and the liners (screws).
Ralf S.
