The 240D (W123) sedan, produced from 1976 to 1985, represents a pinnacle of engineering, renowned for its exceptional durability, reliability, and fuel efficiency. Powered by the robust OM616 2.4L diesel engine, this model offered a comfortable and dependable driving experience, solidifying the reputation for building vehicles that could withstand the test of time and high mileage. Its distinctive styling and focus on practical luxury made it a popular choice for discerning drivers seeking a premium, long-lasting automobile.

This factory service workshop manual provides comprehensive technical information for the 240D (W123) sedan. It covers all essential aspects of maintenance, repair, and diagnostics, including detailed procedures for the engine mechanicals, fuel system, cooling system, lubrication, exhaust, transmissions (manual and automatic), drivetrain, suspension, steering, brakes, and the 12V electrical system. The manual also details body panel repair, interior trim, and HVAC servicing, offering in-depth guidance for owners and technicians to ensure the optimal performance and longevity of their vehicle.