I own a 2010 GTI also. I changed my FF at 3,475 miles. I did it at the 6 month mark. I will be doing 6 month OCI's. I drive 90% city. I did research on every 502 and 504/507 oil at there. The UOA's on the FSI and TSI engines, 502 oils don't cut the mustard past 5K. They don't hold their flashpoint retention either. I'm using Redline 5W-40 in my TSI because it hold its flashpoint even with the fuel dilution. It has one of the lowest Noack of 6%. This will help in the valve deposits.
I wouldn't waste your money on the Euro oils, Lubro Moly, Total, Pentosin, etc. They are no better then the US made oils. If you are worried about your warranty. I would use any of these oils for 5K.
Mobil 1 0W-40
Castrol Syntec 0W-30
Chevron Synthetic 5W-40
Kendall 5W-40
Pennzoil Ultra 5W-40
I would stay away from 504 oils in gas engines in the US. I did a VOA on some Pento Super 5w30. It has a really weak additive pack. If BMW and MB say not to use LL Euro 4 oils in the US do to our gas. Then this should tell you about not using 504 long life oil in our gas engines either. Even though VW hasn't offiaclly said not to.
VW doesn't use any special break in oil. They most likey use Fuchs 5W-40.