for 10k and convertible, you'll have to stick to W208. Stay with 2000-2002 to get the Flexible service schedule and fixed cam. Find the nicest W208 you can get. We are very happy with ours.

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k