So the brakes on my P10 that I just bought aren't that great. They stop the car, but it takes longer than usual and the ABS light is on. Well I drove it to a station to check it out and they told me that the front rotors need to be replaced, and the rear passanger side caliper piston is sitting at an angle, so the rear calipers needed to be replaced.....so I went home, and I took the rear tires and brake pads off and played around with the piston, and it seems fine. It's not twisted or anything and sits flush on the brake pad. However, I think the reason I'm getting crappy braking is that the rotors messed up....they have bumps and crap on them, probably due to sitting around at the dealership for so long. Anyway, I'm not sure if I should go ante up some money for new rotors and pads, or if the problem has something to do with the ABS system, due to the ABS light being on. ABS doesn't work by the way I don't think. I removed both of the ABS relays while the car was running and nothing changed (no noise or whatever). So I'm not sure.