It was bought in 2007 with the intention to keep it, being only my second Audi in 18 years,” Geoff told us. “The car has done over 114,000 miles, but I keep it in perfect condition. Geoff Berrett from Sprotbrough, Doncaster, got in touch with Carbuyer's sister site Auto Express after he noticed bubbles building up on the front wheelarches of his 2005 Audi A6. However, making a claim on that warranty is sometimes easier said than done, as one reader found out. Rust is never a welcome sight on a car, which is why manufacturers go to great lengths to provide warranties against corrosion.