Case C-654/17 P: Judgment of the Court (Fifth Chamber) of 29 July 2019 — Bayerische Motoren Werke AG v European Commission, Freistaat Sachsen (Appeal — State aid — Regional investment aid — Aid for a large investment project — Aid partly incompatible with the internal market — Article 107(3) TFEU — Whether the aid is necessary — Article 108(3) TFEU — Regulation (EC) No 800/2008 — Aid exceeding the individual notification threshold — Notification — Scope of the block exemption — Cross-appeal — Whether an intervention before the General Court of the European Union may proceed — Admissibility)