Daimler , the owner of Mercedes - Benz , has been told by the US Department of Justice to conduct its own investigation into its emissions testing practices , following a class - action lawsuit being filed against the company . This surprise announcement comes as worldwide investigations into emissions cheating by carmakers heats up ; just this week Mitsubishi and Peugeot Citroen offices were raided and Volkswagen has offered to buy back 480k cars in the US to settle its own emissions scandal . Separately, on Friday, Daimler posted a 31% fall in first-quarter profits as costs of new car launches weighed on the bottom line. Yesterday , the Japanese Government announced that the majority of the most popular vehicles sold in the country emitted up to six times more NOx on the road than when in test conditions .
Daimler , the owner of Mercedes - Benz , has been told by the US Department of Justice to conduct its own investigation into its emissions testing practices , following a class - action lawsuit being filed against the company . This surprise announcement comes as worldwide investigations into emissions cheating by carmakers heats up ; just this week Mitsubishi and Peugeot Citroen offices were raided and Volkswagen has offered to buy back 480k cars in the US to settle its own emissions scandal . Yesterday , the Japanese Government announced that the majority of the most popular vehicles sold in the country emitted up to six times more NOx on the road than when in test conditions .