Hi,I'm new to this Audi messaging and i just want to let you know that changing the rear disc and pads on my Audi A3 Quattro was a bit challenging.. I just want to let you all know that taking off the rear caliper you will need a torx T30(made by lazer) and a breaker bar(15") 3/8 drive. I bought it all on ebay. It took me around a 1 hr each side. These torx bolts were very tight but they move with a bit of a perseverance...