Yes VWs latest are PD - Pumpe Duse. Arguably superior to common rail CDI.
The 320 CDI's been succesful and reasonably problem free in Europe so far as I'm aware. Much loved by motoring magazine.
If you're still not convinced, perhaps knowing it's Mercedes' last straight-six car engine might change your mind? The 270CDi is the same with one cylinder less, and I believe the 220CDi the same with 2 cylinders less.
Note that being a straight six is the reason it's not found in the ML-class or C-class - it's too long! Did Mercedes shoot themselves in the foot?
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