Re: Interesting justification.
NOx is only a problem when ... when idling ... during normal driving they wouldn't encounter the situation where the cheating was required
In what way is idling not part of normal driving? In the city, that's what cars are doing much of the time.
Imposing standardised tests is rather more useful than non-standardised tests; at least with standards, VW knows what cheating is 'required'. Other manufacturers might attempt to actually meet standards because people's health is important.