This comprehensive Mercedes-Benz W123 Series Service and Repair Manual provides a wealth of information for owners and mechanics alike. Covering model years 1976 through 1985, it encompasses the 200D, 240D, 240TD, 300D, and 300TD models. With its detailed instructions, illustrations, diagrams, wiring schematics, and specifications, this manual serves as an invaluable resource for all maintenance, repair, and restoration needs. It is specifically designed to guide both do-it-yourselfers and experienced mechanics through every step of the process.

The manual offers a vast array of information, including engine overhaul and rebuilding, brake system repair, sunroof maintenance, timing belt replacement, troubleshooting and diagnostics, computer diagnostic trouble tree charts, engine performance optimization, front end and alignment procedures and specifications, suspension system repair, transmission removal and installation, air conditioning service and capacities, transmission in-car servicing, computer diagnostic codes, firing orders, detailed specifications for each model, factory maintenance schedules and charts, serpentine belt routings, timing belt service procedures, brake servicing procedures, driving concerns, complete torque specifications, U-joint and CV-joint service procedures, repair procedures, complete wiring diagrams, and hundreds of illustrations and vacuum diagrams.

This manual is a complete and intact resource, ensuring that users have access to all necessary information for successful repair and maintenance. Its well-organized structure and comprehensive content make it easy to find the specific information needed. Whether you are troubleshooting a minor issue or undertaking a major overhaul, this manual will empower you to keep your Mercedes-Benz W123 Series running smoothly and reliably.

The Mercedes-Benz W123 series is a renowned mid-size executive car produced by the German automaker Mercedes-Benz from 1976 to 1985. This series was a significant evolution from its predecessor, the W114/W115, and became one of the most successful and enduring models in Mercedes-Benz history. The W123 series was known for its robust engineering, exceptional build quality, and high levels of comfort and safety. Its reputation for reliability and durability earned it the nickname "the Iron Mercedes." Available in a wide range of body styles including a four-door sedan, a five-door wagon (known as the "T-Model"), a two-door coupe, and a three-door station wagon, the W123 catered to various needs and preferences.

The W123 series was also a pioneer in diesel engine technology, with its 200D, 240D, and 300D models offering fuel-efficient and powerful performance. The introduction of the turbocharged diesel engine in the 240TD and 300TD models further enhanced their capabilities. The W123's success was cemented by its advanced safety features, including a rigid passenger safety cell, crumple zones, and standard safety belts. Its well-designed suspension and steering systems provided a comfortable and responsive driving experience, further contributing to its overall appeal. The W123 series' lasting legacy is rooted in its combination of durability, reliability, comfort, and safety, making it a truly remarkable automotive achievement.