The Citroën CX, produced from 1974 to 1991, represents a significant chapter in automotive engineering, building upon the innovative legacy of its predecessor, the DS. Available in Series 1 (1974-1985) and Series 2 (1985-1991) iterations, this front-wheel-drive vehicle is renowned for its advanced hydropneumatic suspension system, which provides unparalleled ride comfort and handling. Powered by a range of inline four-cylinder engines, from 1.8L to 2.5L, including turbo and diesel variants, the CX offered a unique blend of aerodynamic styling and sophisticated technology for its era. Its distinctive design and focus on driver and passenger comfort positioned it as a premium European automobile, appealing to those seeking innovation and a distinctive driving experience. This comprehensive service repair workshop manual offers detailed guidance for the Citroën CX (XA/XM chassis code) covering model years 1975 through 1991. It encompasses a wide array of engine variants, including 1.8L, 2.0L, 2.2L, and 2.5L engines (naturally aspirated and turbocharged), along with diesel options. The manual provides in-depth coverage of all major vehicle systems, including engine mechanical and electrical components, fuel, clutch, manual and automatic transmissions, driveshafts, suspension, steering, brakes, body, interior, exterior, and HVAC. It details routine maintenance tasks, step-by-step repair procedures, troubleshooting guides, diagnostic methods, and essential wiring schematics, making it an invaluable resource for owners, mechanics, and technicians aiming to maintain and restore the Citroën CX.