Diesel Dave -- I can't argue pro or con with your SCR/DPF statements, but I base my original comment on the fact that when I walked through our local VW dealership and one of the diesel engined vehicles was started-up by the salesman for another customer, there was an immediate "...latrine..." (piss) odor in the air. Don't recall which VW vehicle it was however. Doesn't VW use the same "blue-juice" that the Mercedes-Benz Bluetec diesels use?
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