This manual covers the Mercedes-Benz 350 SD Turbo, a full-size luxury sedan produced in 1991, part of the W140 S-Class generation. Engineered with Mercedes-Benz's renowned commitment to quality and reliability, this vehicle was designed for affluent consumers seeking exceptional refinement and advanced technology for its time. The 350 SD Turbo variant features a robust 3.5-liter turbocharged inline-six diesel engine (OM603.970), offering a blend of torque and efficiency suitable for long-distance travel, complemented by a comfortable and luxurious interior and a sophisticated ride.

This comprehensive service and repair manual provides detailed guidance for the full service, repair, maintenance, and restoration of your 1991 Mercedes-Benz 350 SD Turbo. It covers all major vehicle systems, including the engine, fuel, turbocharger, cooling, transmission, drivetrain, suspension, steering, brakes, and electrical systems. The manual offers step-by-step procedures for component replacement, rebuilding, and overhauling, alongside systematic troubleshooting charts, diagnostic procedures, and essential technical specifications. This resource is invaluable for owners, mechanics, and technicians aiming to maintain, repair, or restore this classic luxury vehicle to optimal condition.