STM317 said:I guess the investigation has been ongoing for quite awhile now. This article from July of 2017 goes into a little more detail about the investigation. They're claiming that this collusion potentially goes back to the 90s and tons of people (including politicians) either knew about it, or were complicit in it's continuation.
OK, that seems to fill in the missing piece of the puzzle. That one makes it sound like they were sharing emissions cheating technology instead of (or possibly alongside) real emissions-cleaning technology, and were trying to run some sort of DEF price-fixing scheme.