The German Connection Achievement
The German Connection20
Drive 200 miles on Nurburgring in Audi, BMW, Mercedes-Benz, or Volkswagen models.
For efficiency, you should combine this with "Nurburgring Professional." The faster car you choose on the Nurburgring GP circuit, the faster this should unlock. I recommend the Series League, S Class Series using any S Class car from Audi, BMW, Mercedes-Benz, or Volkswagen. If you end up a few miles short after your career wins, using a German car for your multiplayer wins should provide you any remaining few miles you have left.