If your local Sears can find a set, consider the Michelin Weatherwise Sport for about $62 each. They have a T speed rating, and I don't think you'll find better in this size. I got a set and I'm happy, especially at the price. No serious vibration issues. I think they're being discontinued, and they're only sold at Sears. My local store was able to pick some up from a store in another city.

Oh, and they look "right" on a Mercedes.

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'01 SLK320, '79 450SL & '01 C320 -- What? 3 Mercedes? I am DEFINITELY crazy!!!