[Mark Howard]

I have the same issue with my car. The dial has a rubberized coating that is common on all Porsche, VW and Audi cars recently. I have a Passat also with the same issue, but on all the dials and buttons. To replace to dial on a 997, I think it requires replacing the entire module, big bucks. My current solution, which is rather half azz but it works, is to use a Sharpie or permanent black marker to touch it up every now and then. It's not perfect, but it is better than the white plastic staring at me. I do recall, back from my early military days in the Army, there is a product we used on it brass eyelets of our black boots when the coating wore off. It was called M-Nue as I recall, tough as nails and very dark black. If I ever find some, I'll try that as well.