Idle Issues with my 140 TDI (interesting findings??)

[popey]

It seems I have the common problem of the rough idle when the engine it warm.

However I have noticed the idle is much smoother if the car is on the level (not stopped on a hill or even slight gradient). I also noticed its slightly helped if turn the air-con on.

I have spend a few days reading up on this, various forums but non of the above as been mentioned (hill or air-con).

Any thoughts?

[craigus]

i would be interested to know if anyone knows any info on this as mine has a really poor idle too mines a 54 plate