Case C-100/21, Mercedes-Benz Group (Liability of manufacturers of vehicles fitted with defeat devices): Judgment of the Court (Grand Chamber) of 21 March 2023 (request for a preliminary ruling from the Landgericht Ravensburg — Germany) — QB v Mercedes-Benz Group AG, formerly 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)