Thanks for the tips guys, got my car back today.
As predicted the O2 sensor was replaced and the light went out easy I guess to fix compared to intermittent faults - the other issues Windows, Auto Hold & Tyre Pressure issues couldnt be replicated so to the dealership they don't exist so I have agreed to film them on my phone when they happen which they will - can't wait for the loan car!!
I'm glad it's a lease car and haven't invested personally in this car I only have 18 months togo then I'll be taking a break from Volks - maybe! But the Rline Passat on 19's does look nice, fickle!!!!