Read up a bit. Many vw and Audi dealers are being very meticulous about this spec and usimg the correct 0w20. I know my dealer is in the know.
So, why did you come again to ask question? It seams to me we did not confirm what you wanted to hear so now you are trying to justify your decision making.
Manual says VW502.00. You can by all means use 0W20 VW508.00/509.00. No one is saying you cannot. You car, your money.
However, since manual is saying VW502.00 you are good with that oil. I know I personally would NEVER put 0W20 in EA888.