what could be causing slight jerk in new engine?

[Kendo]

I get the same thing with my 06 Leon TDI (105). It happens when the pedal is only just being touched, and put it down to the throttle being closed and then opened again very quickly with slight movements of the foot, going over a bump etc.

No mater how hard I try I can't make the car do it.

Thats what I thought. Find mine does it when im in low revs and going round a tightish bend which is decreasing the speed of the car. Its certainly not giving me any cause for concern. Just putting it down to being new to tdi.