hi not long ago iv baught an 2006 a3 2.0 tdi quattro s line. I did want the 170 bhp model but it was hard to find one with the right milage an price so i got the 140. I love the car however its not the 170. So iv spoke to amd in essex about the stage 1 which would put it up to 185bhp. I have heard that they are the best people to go to. They say the clutch will be fine, others say it willl slip. i really want it done but dont want it to go! be grateful for any feedback thanks rich.