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50-50 torque split gives easy handling on the loose
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Clearly, the CDI versions will be cheapest to run, but strangely the 320 is rated as no thirstier than the 280. All will have expensive servicing at Mercedes dealers, but not too frequently. All engines meet Euro 4 emissions standards, but particulates aren't included in those standards so Mercedes-Benz offers an optional particulate trap for the diesels. It needs no maintenance.
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