The Mercedes-Benz 300CD, produced in 1985, represents a distinguished luxury mid-size coupe from the renowned W123 chassis generation. This model is celebrated for its exceptional engineering quality, robust build, and the legendary reliability of its 3.0-liter inline 5-cylinder turbocharged diesel engine (OM617.952). Combining distinctive coupe styling with a comfortable and well-appointed interior, the 300CD was designed for discerning owners who valued both performance and enduring quality. Its enduring appeal lies in its solid construction, advanced (for its time) safety features, and the inherent durability that has made W123 chassis vehicles highly sought after by enthusiasts.

This comprehensive service and repair manual provides detailed information essential for the maintenance and restoration of your 1985 Mercedes-Benz 300CD. It covers a wide array of systems, including complete engine overhaul procedures for the OM617 diesel, transmission repair for both manual and automatic variants, brake system servicing, and detailed electrical system diagnostics with comprehensive wiring diagrams. The manual also offers guidance on suspension and steering, body and chassis work, and includes procedures for routine maintenance, troubleshooting common issues, and in-depth technical specifications such as torque values and fluid capacities. Its purpose is to equip owners, mechanics, and technicians with the knowledge needed to keep this classic Mercedes-Benz in optimal condition.