The Citroën CX, introduced in 1974 as the successor to the iconic DS, represents a pinnacle of automotive engineering and design for its era. This Series 1 model, specifically the 1975 iteration, offered a range of variants including the CX20, CX22, CX2400, CX2400GTi, and CX2200 Diesel. Renowned for its aerodynamic styling, inspired by Maserati, and its revolutionary hydropneumatic suspension system, the CX delivered an unparalleled level of ride comfort and handling. The advanced DIRAVI variable power steering further enhanced its sophisticated driving experience. Positioned as an executive-class automobile, it competed with prestigious European manufacturers and was celebrated for its technological innovation and futuristic interior, solidifying Citroën's reputation for avant-garde automotive solutions. This comprehensive workshop and service repair manual provides extensive coverage for all Citroën CX Series 1 models. It details procedures for all gasoline and diesel engines, manual and automatic transmissions, and the intricate hydropneumatic suspension, steering, and braking systems. The manual includes in-depth information on engine mechanicals, fuel and cooling systems, electrical components, and bodywork, offering step-by-step instructions for maintenance, diagnostics, and repair. With detailed wiring diagrams, troubleshooting guides, and specific adjustments for systems like DIRAVI steering and hydropneumatic suspension, this manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain, repair, and preserve the exceptional performance and unique characteristics of their Citroën CX.