SHOCKED  when I read this story ...didn't know European car makers pay pvt firms to test their cars and supply totally stripped out versions to boot which makes mileage testing a joke  ...major conflicts of interest also and the gov'ts just take their results ...very disspointed to discover that there is no EPA like agency in Eurozone ....I suspect we are breathing a lot more real world lung and life damaging pollutants than we think ! 

I suspect there is long standing complicity  of looking the other way for all involved incl govt officials in Germany to prop the ecomonmy and unions ....ironic that Audi tag line is " Truth in Engineering " !

http://www.wsj.com/articles/europes-auto-makers-keep-test-firms-close-1443648097