My biggest issue at the momen is the MPG seems low (or maybe my expectations were too high). I did 11 miles, mostly 60~70mph dual carriageway driving, and TRIP said average of 40mpg and then 20 miles of mixed road driving and TRIP read average of 32mpg, was just hoping for more I guess being a diesel. Also it only feels like the turbo is helping from around 1700/1900-2500/3000 RPM, either side of that it feels non existent. It also doesn't like low revs, and seems very noisy (like a rumbling) could this be the DMF (or SMF as it has been suggested this might of been changed/converted)?
Another problem, which has been there from day 1 is, the car struggles to start when cold. It sounds like it wants to start but doesn't, or at least it revs a little then cuts out, or you just hear the starter motor noise but doesn't start at all. 9/10 it will start if you have your foot on the accelerator whilst trying to start it, it starts, revs are around 800-950 (even with foot hard down on accelerator) for about a second or 2 before it starts to rev.