The gist seems to be about getting US spec parts to mod an older diesel X3. To reduce Nox emissions from Euro 5 to Euro 6 compliance you fit an extra Cat / DPF and an Adblue tank. That's to avoid having to trade up to a brand new BMW.
Apparently the required emission control parts are made in Germany and fitted to USA spec diesel X3s from 2008 (I think)
[disclaimer - my O-level German is somewhat rusty now]
Yes, that's about it, @SpeedyDux. Apparently, BMW are the only manufacturer who are claiming that Euro5's cannot be retro fitted with equipment to reduce emissions to Euro 6 levels. The reason they give is that it would take around three years to develop the appropriate parts. They claim that the only way to get round having a 'problem vehicle' is to buy a new one.
However, emissions standards have been stricter in the US for some time and BMWs produced for the US market are fitted with the relevant parts. These BMW-produced parts are freely available in the US and can be fitted to a vehicle at a cost of around 1500 Euros.
BMW are, however, refusing to fit these to older vehicles in Germany.