I have recently been driving a late 2007 2.0tdi S line 140 a4 saloon 6 speed manual.
Engine is good on start up, no rattling or shaking what so ever. However, in first gear the car seems to be very sluggish. There is no excess smoke from the car, it has been serviced regularly and again, engine is very good. I have had a few tdis and this one is very slow. The car has plenty of power in all the other gears and accelerates very well.

I plugged in my diagnostic and there are no fault codes etc.

What do you guys think this is?

Many Thanks!