My front left wheel arch was blistering a few months back. Took it in to Robinsons VW Norwich and they tried to fob me off with the old 'wheel arch liner' excuse. Had a big bust up with them then called VW UK who were very helpful. Ended up having to pay for 30% of the cost of repair (£100), which was better than the full cost. They know the wheel liner is a design fault, just won't admit it, still p!ssed off I had to pay 30%, but they would not budge. Don't let the dealers get away with it, they are a bunch of w@nkers!