Just before I cancel my deposit/"order" and leave this interminable wait behind me, I've contacted the EU (via europa.eu) for the current state-of-play with the action against Germany (the country, not just the car manufacturers) in the Court of Justice. I await a reply. My Google skills are normally quite good, but other than the press release I posted many pages ago (http://europa.eu/rapid/press-release_IP-15-6290_en.htm) I can't find any references to the case.
Good luck in getting a reply.
The wait may take longer than waiting for the car itself once the bureaucratic wheels start turning round