stcbenz83, check for any indications of head gasket failure ... oil dripping on the outside of the engine, or oil in the coolant expansion tank. Best to have a PPI (pre-purchase inspection) done by a MB-trained tech so you get a professional evaluation of the car. Pretty doesn't necessarily equate to mechanically sound. A complete set of service records assures that the car has been maintained properly.

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Fred Hoelzle