This manual covers the Mercedes-Benz W123 E-Class, produced in 1979. Renowned for its robust engineering, durability, and safety for its era, the W123 was a benchmark in the executive mid-size segment, competing with vehicles from BMW, Audi, and Volvo. This model is celebrated for its build quality and longevity, particularly its diesel variants, which are known for exceptional reliability. The W123 was offered in various body styles, including Sedan, Coupe, and Estate, and was available with a range of gasoline and diesel engines, such as the 2.8L M110, 2.3L M115, 2.2L OM615 Diesel, 2.4L OM616 Diesel, and the highly regarded 3.0L OM617 Diesel.

This comprehensive factory service manual provides detailed technical information essential for the maintenance and repair of your 1979 Mercedes-Benz W123 E-Class. It covers all engine types, body styles, and major vehicle systems, including engine mechanicals, fuel systems, transmissions (manual and automatic), brakes, suspension, steering, and electrical systems. The manual includes routine maintenance schedules, troubleshooting guides, component rebuild procedures, torque specifications, and identification of special tools. Its depth of coverage is equivalent to dealership-level technical data, empowering owners and technicians to service the vehicle to factory standards, ensuring its continued performance and longevity.