From memory it needs to be VW/Audi grade 507.00 5/30 f/s. I used 504.00 (a lot cheaper) in my last car and it didn't seem as quiet afterwards so will only ever be using 507.00 from now on.
... it's 5w/30 ...
As far as I am aware, all oils that meet the 504.00 spec also meet the 507.00 spec (all the ones that we have do and I've not seen different from other companies), so it's likely to be that the car didn't like the oil that you used last time for some reason.
Cheers
Tim