I just bought a pair for a Dodge Neon SRT-4 only to match the other two on the car and because they were much cheaper than any other 18 inch tire of that size. I read the reviews which were mostly postitive with a few negative but overall for a car like this I thought I would give them a try. I got them at a place called http://www.tires-easy.com for under $70 including shipping. Not sure if it befits a Mercedes though.