I don't know that it matters if they don't rust out if it's only used in the southwestern climate. That said, I wouldn't know what to do with one on the streets and roadways of Dallas, Texas, that my W211/W210 turbodiesels aren't already doing a much better job at - for considerably less per-mile-cost. MPG has to be dismal versus the MB diesels, no?

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'06 E320 CDI
'17 Corvette Stingray Vert