https://www.cnet.com/roadshow/news/eu-commission-bmw-daimler-vw-alleged-collusion-emissions-tech/

This isn't just about diesels, but they're in here, too.

According to the Commission's press release, the group is concerned that collusion occurred with regards to two different emissions-reductions systems. On the diesel side, the group alleges that the automakers "coordinated their AdBlue dosing strategies, AdBlue tank size and refill ranges between 2006 and 2014 with the common understanding that they thereby limited AdBlue-consumption and exhaust gas cleaning effectiveness."