Thanks for the reply. The thing which is interesting is this part of the focus.de article:
Zwei Motoren des Vorgänger-BMW 3er erfüllten bereits 2013/2014 die Euro-6-Norm:- 320d (163 PS)
- 330d (258 PS)
If we assume that is correct, what would be the way to get the EURO5 changed into EURO6 in the car's papers?