I have a Mercedes-Benz E280CDI, which I bought new in November 2005 and which has patches of corrosion on all four of the alloy wheels. My local dealer has sent photographs of the corrosion to Mercedes-Benz who have refused to pay for any replacement or refurbishment. My only personal previous experience of alloys has been on a Vauxhall Omega MV6, which I purchased new in 1997 and, when I sold it in November 2005, the alloys were unmarked. I also have a friend who owns a Volvo S60, which he bought in early 2005, and his alloys do not have any corrosion. I maintain that the wheels on my car are not fit for purpose, and I have told the local dealer so. I would welcome your advice as to whether I am being unreasonable, and if not, what would you suggest I do next? The only response from my local dealer has been to give me the details of a couple of firms who refurbish alloy wheels, at a cost to me of course.