The Mercedes-Benz 300 CD, model designation W123 Coupe Diesel, produced in 1985, represents a pinnacle of German engineering from its era. This 2-door coupe, built on the robust W123 chassis, is celebrated for its exceptional diesel engine longevity, comfortable ride, and stylish design, offering a refined and fuel-efficient personal luxury experience. Its robust build quality and excellent highway cruising capabilities made it a standout competitor in the luxury coupe market, embodying Mercedes-Benz's commitment to durability and performance.

This factory repair service manual provides comprehensive guidance for the maintenance and repair of your 1985 Mercedes-Benz 300 CD. It covers essential areas including detailed procedures for the 3.0L inline 5-cylinder diesel engine (OM617.912), fuel system, 4-speed automatic transmission, drivetrain, suspension, steering, brakes, and electrical systems. With in-depth diagnostic and repair information, this manual is an indispensable resource for professional technicians and advanced DIYers seeking to preserve the performance and longevity of this iconic vehicle.