hi i've run vag-com on my car as its running rough (hunting idle and low power)

and got this fault code read-out but doesn't overly help :(

00537 - Lambda (Oxygen Sensor) Regulation

19-00 - Lower Limit

00520 - Air Mass / Air Flow Sensor (G70)/(G19)

31-10 - Open or Short to Ground - Intermittent

so can someone help please

Try disconnecting the MAF, and see if the running improves.

Also try checking the voltage across the lambda on a hot engine, lookin for about 0.7V IIRC.