Hi, Yes that is the car, I have a few things to check tomorrow

Air leaks, I already have, but only visual ( smoke test tomorrow )

egr valve test ? do you think this could be the problem?

air fuel sensor, Still not sure how to test this, I have the details of the voltages at the pins from autodata , but the wiring diagram and test precedures are for a 6 wire sensor.

I think I am strugling withe Verus because I am not selecting the correct engine, I dont get the option of the BKY, so I am not getting the correct pids available.

I could use vag com but i dont know where to start.