This manual covers the Mercedes-Benz 300CD (W123 chassis) produced in 1985. Renowned for its exceptional build quality, durability, and engineering excellence, the 300CD represents a significant era in mid-size luxury automotive design. Its robust 3.0L turbocharged diesel engine (OM617.952) and reliable 4-speed automatic transmission are hallmarks of the brand's commitment to longevity and performance. This vehicle, part of the iconic W123 generation, is celebrated for its timeless styling and solid construction, making it an essential resource for maintaining its classic appeal and operational integrity.

This comprehensive workshop manual provides detailed guidance for the service and repair of your 1985 Mercedes-Benz 300CD. It covers all major systems, including the engine, transmission, drivetrain, suspension, brakes, and electrical systems, offering step-by-step procedures for routine maintenance, diagnostics, troubleshooting, and major overhauls. With over 800 pages of information, including clear diagrams and torque specifications, this manual is an indispensable tool for owners, mechanics, and technicians seeking to preserve the performance and reliability of this classic Mercedes-Benz.