Easy to install: either take an OBD-Eleven scanner or use 12V to reverse the rear caliper polarity. I have an RS7, the piston and boot rotate to release it. In any case, you have to press them in afterwards. 40 to 10 five times and 30 to 5 mph five times to pound them into the rotors and you're done. No dust after every 100 km. This is a game changer for me! Get them, great quality and they fit perfectly!