CELEX:62021CJ0100: Judgment of the Court (Grand Chamber) of 21 March 2023.#QB v Mercedes-Benz Group AG, anciennement Daimler AG.#Reference for a preliminary ruling – Approximation of laws – Approval of motor vehicles – Directive 2007/46/EC – Article 18(1) – Article 26(1) – Article 46 – Regulation (EC) No 715/2007 – Article 5(2) – Motor vehicles – Diesel engine – Pollutant emissions – Exhaust gas recirculation valve (EGR valve) – Reduction in nitrogen oxide (NOx) emissions limited by a ‘temperature window’ – Defeat device – Protection of the interests of an individual purchaser of a vehicle equipped with an unlawful defeat device – Right to compensation from the vehicle manufacturer on the basis of tortious liability – Method of calculating compensation – Principle of effectiveness – Article 267 TFEU – Admissibility – Reference to the Court from a single judge.#Case C-100/21.