Right, I got them all off this morning.. I had to take the rear wheels off but the front ones have been designed so that you can take them off without removing the wheels..
I'm gonna post a bunch of pictures with the progress just in case anyone else was curious or wanted to have a go
So first of all the front mud flaps..
This is how they looked before I started.
You will have to look quite close, but there are three torx screws to undo and two clips, two of the screws below the clips and the final screw it further into the arch, placed at an angle as that it is accessible while the wheel is set to full lock.
Once you have undone the screws, its just a case of gently pulling the flap towards the wheel then pushing it into the wheel arch to unclip it.
As you can see here, it was quite a mess underneath the mud flap, so while the trim was loose I decided to have a clean up.. and discovered 7 years worth of built up dirt and mud stuffed in behind the trim.. You can see how much was in there in one of the next pictures.. I basically just scraped as much of it as I could out with a screwdriver before cleaning off the bodywork and refixing the trim back into place with the three torx screws.
The collection of dirt discovered (both sides of the car)
Cleaned up and the three screws reinserted to hold the trim back in place
All done
Next up was the rear wheels, I just jacked the car up one side at a time and took the wheel off. Sprayed plenty of WD-40 onto the screws as the rear ones on my car were just phillips screws which had become clogged with dirt and rust.
You can see the three phillips screws here and there is also a small 10mm plastic nut that you have to undo which is behind the wheel on the back wall of the wheel arch. this must be put back afterwards though as it is holding some of the other trim in place.
Once the three screws and the nut are off the mud flap just pops right off. I only put the 10mm nut back when doing the rear mud flaps as there are torx screws already holding the trim in place so the three screws seemed unnecessary.
Hope this helps
