Media reports have been stirring up the Dieselgate pot, alleging  Volkswagen – as well as Daimler and BMW – have been involved for decades  in secret dealings akin to a cartel.
 German newspaper Der Spiegel has quoted a letter sent by Volkswagen  to German competition authorities and reported a new investigation has  been opened into practices of Mercedes-Benz, BMW, Audi, and Porsche.  Apparently, the companies had been involved in secret meetings since the  1990s to fix the prices of diesel emissions treatment systems – among  others. BMW is at the moment the only carmaker to officially react to  the accusations, through an official statement.
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