I have driven an E220 CDI and also an E270 CDI both in the W210 chassis, those engines are really incredible when it comes to power:size ratio. The 220 CDI could do smoke burnouts on a W210 easily, Both cars would trip the ESP into crazy if I did a WOT start on any sort of road.

This was not in the US though.

The engines are common rail and have about 1600 bar fuel rail pressure under load - sound a bit like a volvo 18 wheeler at idle too. not the sweet clack of the OM606 but more of a rumble.

They have their own set of finickies like cleaning the coal mine that gets lodged in the intake manifold and other tests. In EU there are a few dozen service centres for these cars in major metro cities hence no issues, in US its a problem as only MB or some chrysler dealers will repair them.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)