This comprehensive 1977-1983 Mercedes-Benz W123 Series 240D Service Repair Manual offers a detailed guide for maintaining, repairing, and restoring your vehicle. It contains the same information used by your local Mercedes-Benz dealer, providing you with the most accurate and up-to-date service information available. This manual is your go-to resource for all diagnostic and repair procedures, ensuring you have the knowledge and tools to keep your vehicle running smoothly. The manual covers a wide range of topics, including:

**Maintenance and Service:** General descriptions, operating instructions, service product information (fluids, etc.), jacking-up, towing, and vehicle lay-up procedures.

**Engine:** Removal and installation, crankcase, cylinder head, engine breathing, crank assembly, engine timing, valves, diesel injection system, air cleaner, intake air preheater, exhaust gas turbocharger, air compressor, belt drives, intake manifold, exhaust manifold, engine brake, emission control system, electrical system, lubrication, engine oil cooler, engine cooling system, coolant hoses, radiator, and engine mounting.

**Transmission:** Clutch, manual transmission, power take-offs, automatic transmission, transfer case, and pedals.

**Throttle Control:** Adjusting throttle linkage, removal and installation of engine longitudinal regulating shaft, removal, installation, and adjustment of front wall regulating shaft, and removal and installation of the accelerator pedal.

**Chassis and Suspension:** Frame, trailer operation, suspension, front axle, rear axle, trailing axle, wheels, chassis measurements, propeller shaft, brakes (hydraulic and mechanical systems), brakes (pneumatic system and auxiliary brakes), steering, fuel system, exhaust system, heat shield, outer, electrical system, equipment and instruments, speed control systems, auxiliary drives, hydraulic and articulated systems.

**Body:** General, understructure, front end and front wall, side wall, rear wall and rear end, roof, glass (panes) and windows, interior equipment, doors, trunk lid, fuel flap, slide roof (sun roof), top, racks, electrical system (body), radio, windshield washer system, light range regulator, climate control, emergency equipment, sanitary equipment, kitchen, attachments, outside flaps, seats, cots, restraint systems, body noises, sound insulation, body sealing, anti-corrosion protection, and paintwork.

**Tools and Equipment:** Tools, test instruments, and equipment.

**Technical Information:** Technical literature, validity list, and administration.

**Maintenance Manual:** Included for detailed maintenance procedures.

**Owner's Manual:** Provided for general vehicle information and operation.

This comprehensive manual offers everything you need to confidently maintain and repair your 1977-1983 Mercedes-Benz W123 Series 240D.

The 1977-1983 Mercedes-Benz W123 Series 240D is a classic example of German engineering excellence, known for its robust construction, reliable performance, and enduring value. This diesel-powered sedan, part of the W123 generation, was a popular choice for those seeking a fuel-efficient and durable vehicle. The 240D was powered by a 2.4-liter four-cylinder diesel engine, renowned for its longevity and efficiency. It was capable of achieving impressive fuel economy for its size, even by today's standards, and boasted a reliable powertrain that could withstand the test of time. The W123's design incorporated a sturdy chassis, a comfortable interior with durable materials, and a spacious cabin that accommodated five passengers comfortably. While the original 240D was offered in various body styles, including sedans, coupes, and wagons, the 240D was primarily sold as a sedan, offering a balanced blend of practicality and comfort.

The Mercedes-Benz W123 Series 240D was a testament to German engineering principles, featuring robust construction, meticulous attention to detail, and a timeless design. These vehicles were widely admired for their unwavering reliability and ability to withstand demanding conditions. While modern vehicles have outpaced the 240D in terms of technology and performance, the W123 series remains a symbol of enduring quality and reliability. Many examples continue to be driven and cherished by enthusiasts, demonstrating the enduring legacy of this classic Mercedes-Benz model. The availability of an original Factory Service Manual (FSM) provides a valuable resource for DIY enthusiasts and mechanics, offering detailed instructions and specifications for maintaining and repairing this iconic vehicle.