The Mercedes-Benz W123 E-Class, produced from 1976 to 1985, represents a significant era in automotive luxury and engineering. Known for its robust construction, exceptional durability, and comfortable ride, the W123 offered a range of gasoline and diesel engines, manual and automatic transmissions, and various body styles including saloon, estate, and coupé. It competed with other premium vehicles of its time, often distinguished by its superior build quality and longevity, earning a reputation for being exceptionally reliable and well-engineered, a testament to Mercedes-Benz's commitment to excellence.

This factory service and repair manual provides comprehensive, dealer-level technical information for all W123 E-Class models. It covers every aspect of maintenance, repair, and overhaul, from routine servicing such as oil changes and filter replacements to complete engine and transmission rebuilds. Detailed sections on the engine, transmission, drivetrain, suspension, brakes, steering, electrical systems, bodywork, and HVAC are included, along with essential troubleshooting guides and technical specifications. This manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain and repair their W123 with accuracy and efficiency.