I bought a set of pad and discs (£50.00) and want to change them some time this month. I did the same thing with a Nissan Micra some years ago and don't really expect much of a problem, but I believe the Copen has ABS - I've not seen that before. My plan was to open the reservoir, take the calipers off as usual and push the the pistons back with a g-clamp to make room for the new pads, but I see conflicting advice about doing this. Some say to open the nipples rather then just letting the fluid push back into the system, which is a bit of a pain. Has anyone done this job themselves? Did you open the bleed nipples when pushing the pistons back? Cheers!