Daimler, the company that owns Mercedes-Benz, has announced that it will conduct an internal investigation on its process of certifying emissions for its cars.
The investigation comes at the request of the US Department of Justice. The car maker said that it will " investigate possible indications of irregularities and of course take all necessary actions." It also said it will defend itself against lawsuits from owners who say their models cheated emissions tests.
• VW emissions scandal: latest news
The news comes as car maker Peugeot was investigated by French anti-fraud authorities, as part of an ongoing probe by the country into its manufacturers' emissions. The brand has assured customers that its cars are compliant with the current regulations, and that "Confident in its technologies, PSA Group is fully cooperating with the authorities."
This follows French raids on Renault previously, done for the same reasons following 2015's VW 'dieselgate' emissions scandal where the German manufacturer was found cheating emissions tests.
VW has also had to make a deal with the US government this week, where it will have to fix or buy back 482,000 models that were involved in the scandal that saw a 'defeat device' fitted to cheat US NOx tests.
Mitsubishi is another manufacturer involved in emissions news this week, with the Japanese company admitting that it tampered with some of its models to improve economy and emisssions figures. The US authorities have asked Mitsubishi for more details on the issue, despite the models affected only being available in Japan.
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