I've come to this car from a Mk5 Golf GT TDI with the 140 engine and I am really surprised at how rough the 170 engine appears to be compared with the 140. Yes the 170 has more power (above about 2,000 rpm) but, it is very growly. Also the throttle response in neutral seems very notchy, the revs go up in steps rather than smoothly. Is this normal. I would like to get a remap and DPF removal done, but all the specialists I read about appear to be in the Midlands and northwards. Is there anyone who comes well recommended in the south east. Thanks K.