This manual covers the Mercedes-Benz 300SD, chassis code W126, powered by the OM617 engine. Produced between 1978 and 1985, this luxury sedan is renowned for its durability, comfort, and strong diesel performance. Key features include a 3.0-liter turbocharged inline-5 diesel engine, a 4-speed automatic transmission, and advanced safety systems for its time, such as crumple zones and optional ABS. The 300SD is recognized for its excellent fuel economy and robust engineering, making it a highly regarded vehicle among owners and enthusiasts alike.

This comprehensive factory service manual provides detailed information for the maintenance, repair, and diagnostics of your Mercedes-Benz 300SD. It covers all major systems, including the OM617 diesel engine, fuel system, transmission, suspension, brakes, steering, electrical system, and climate control. With over 1000 pages of content, this English-language manual offers step-by-step repair instructions, troubleshooting guides, diagnostic procedures, and critical torque specifications. It is an essential resource for owners, independent repair shops, and technicians seeking to maintain and preserve the longevity and performance of this classic Mercedes-Benz model.