The point is, that all cars pollute, and the point was made in general, rather than specifically aimed at a particular pollutant. The M5 will knock out tonnes more CO2 for example. To say its selfish because you have a car that pollutes more extends to people who also drive cars that aren't just ecoboxes. It shouldn't really be classed by individual pollutants, but as an overall picture of all pollutants. That's what got us into this "huge amount of diesels on the road" mess in the first place. If you don't want to be so selfish, then perhaps some sort of small hybrid / ev is the way to go. Everything else has an element of selfishness to it, as do these forms of transport too really.
I get what your saying, to be fair. And I mostly agree. But there are still loads of cars on the road that do not have a DPF. Are the drivers of these cars more selfish because their car doesn't have one? Pretty sure my Alhambra doesn't have a DPF, does that make me more, or less selfish than someone who perhaps couldn't afford to repair the DPF on their car? Presumably both cars would be kicking out roughly the same amount of pollutants.
Anyway, back on topic. I do like the Passat, sorry, Phaeton. Did VW do these with the 4.2 TDI? I had a look at the W12's before, but as I plan on often drive the ~450 each way to Bristol, I didn't really fancy having to stop on the way to fill up (obviously 1 tank per way). I would imagine the 4.2TDI would make it in one tank though.