This manual covers the Mercedes-Benz 350 SD Turbo, chassis code W140, produced in 1991. As a flagship model of its era, the 350 SD Turbo represented Mercedes-Benz's commitment to engineering excellence, robust construction, and luxurious comfort. This particular model features a 3.5-liter inline 6-cylinder turbocharged diesel engine (OM603.970), known for its torque and longevity, paired with a 4-speed automatic transmission. Its design emphasized durability and a smooth driving experience, positioning it as a strong competitor in the full-size luxury sedan market.

This comprehensive repair service manual provides detailed information essential for the maintenance, diagnosis, and repair of your Mercedes-Benz 350 SD Turbo. It covers a wide range of systems, including complete engine overhaul procedures, fuel injection and ignition systems, automatic transmission service, brake and ABS diagnostics, suspension and steering, and the electrical system. The manual also details routine maintenance, troubleshooting common issues, and provides technical specifications. Its scope is designed to assist both professional technicians and dedicated DIY enthusiasts in keeping this sophisticated vehicle in optimal condition.