Mercedes-Benz is all about efficiency these days – and capital letters, apparently. Just like the S400 BlueHYBRID, the new S320 CDI BlueEFFICIENCY gets the CAPITAL treatment. Rather than some tricked-out lithium ion powered hybrid system though, the S320 CDI gets a 3.0 liter diesel six. Added for efficiency are a seven speed automatic and [...]
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