this prob was mainly cause the disk used on that A3 were cheap aftermarket ones and the pads were too hard.
What turbo is that?
btw, I see something named "inside catia",,, don't know in the uk, but catia in italian is a womens' name,,,
Loven your black bonnet and yellow calipers mate.
Its a stock k04 thats hada larger compressor wheel, been polished, ceramic coated etc