Cheers!
It wasn't difficult as such, but it certainly had it's challenges, and I wouldn't have been able to do it on my own - I had a massive
help from
@Damo H on the physical side and we followed
@theoldboy 's
guide to remove the rear bumper.
Removing the rear bumper itself wasnt too bad once all the screws had been 'correctly' located and removed (slight fail on my part with my side of the car, but
@Damo H managed with no
problem at all!).
Note - be careful when removing the rear lights screw...I now have a plastic washer bouncing around in my rear boot lining/wheel arch somewhere!
Once the bumper was off, the hardest part was removing the existing diffuser, which was a complete ballache! There will be stabbing and trapping of fingers, potentially a lot of swearing (we refrained as there were ladies & children present), and the overwhelming urge to take a hammer to the bumper and then launch it into the nearest field.
Once the old diffuser is off, install the bumper back on the car (making sure you use the correct screws for the ones under the lights before they go back on!).
Rieger kindy provided the destructions in German, so we had to roughly see what was happening through the unclear black and white pictures provided.
Simply slide the new diffuser into the bumper, then get under the car. There are 5 metal brackets provided (much like the ones in IKEA furniture) which utilise the old diffuser screw holes, and then allow you to bolt the diffuser on. The three in the middle are fine. The two on the outside are a pain. But we managed to do it all in around 3 and a half hours with most of our fingers and hands in tact.