On 10 July 2026 the High Court handed down judgment following the liability issues trial in the Pan-NOx Emissions Group Litigation — the largest group action in English legal history. Around 1.6 million claimants, proceeding under Group Litigation Orders, alleged that diesel vehicles made by the lead defendant manufacturers — Mercedes-Benz among them, alongside Ford, Renault-Nissan and Peugeot-Citroën — contained prohibited defeat devices: software that kept NOx emissions low