Dear Roger,
Two years ago I purchased a 2017 Audi A4 from a dealer and didn't realize that there was a stain on the rear center leather seat until many months later. I think the dealer cleaned it but eventually whatever they did wore off and the seats have looked like they do in the pictures below ever since. I do not know what caused the stain so I'm unsure how to go about removing it (if possible). Do you have any suggestions?
Thank you!