Order of the Court (Seventh Chamber) of 6 May 2021.#Criminal proceedings against X and Others.#Requests for a preliminary ruling from the Juge d'instruction du tribunal de grande instance de Paris.#Reference for a preliminary ruling – Article 99 of the Rules of Procedure of the Court of Justice – Approximation of laws – Regulation (EC) No 715/2007 – Article 3(10) – Article 5(2) – Defeat device – Motor vehicles – Diesel engines – Emission of pollutants – Program acting on the engine control calculator – Technologies and strategies to limit the production of pollutant emissions.#Joined Cases C-690/18 to C-692/18.