Hello,thank you.These places are divided into ALL Crome. The dealer says it's not a guarantee thing. What I can't believe. Allegedly from salt in winter . For me it looks like poor quality. Sorry for my bad English. I am German 😇And i am still learning .Welcome to the forum IckeBerlin
Hard to tell by the pictures, to me with out seeing the entire front end two things come to mind (1) Road Debris (2) Insects and
the release of acid in their body's on impact.
Have you rolled it into your VW Dealer to see what they have to say ?
Again, Welcome to the forum !