This comprehensive Mercedes-Benz W126 Service Repair Manual covers all model years from 1981 to 1991, encompassing the 300SD, 300 SDL, 300 SE, 300 SEL, 350 SD, 350 SDL, 380 SE, 380 SEL, 380 SEC, 420 SEL, 500 SEL, 500 SEC, 560 SEL, and 560 SEC models. It is your ultimate guide to maintaining, repairing, rebuilding, refurbishing, or restoring your classic W126 Mercedes.

The manual is meticulously detailed, providing step-by-step instructions, detailed illustrations, diagrams, wiring schematics, and specifications for every aspect of your car. It covers everything from engine overhauls and rebuilding to brake servicing, sunroof repairs, timing belt replacement, and troubleshooting. You'll find comprehensive information on engine performance, front end alignment procedures, suspension components, transmission removal and installation, air conditioning service, computer diagnostic codes, firing orders, and detailed specifications for every model covered.

This indispensable resource also includes factory maintenance schedules, serpentine belt routing diagrams, timing belt service procedures, brake servicing procedures, driving concerns, complete torque specifications, U-joint and CV-joint service procedures, repair procedures, complete wiring diagrams, hundreds of illustrations, and vacuum diagrams. Whether you are a seasoned mechanic or a DIY enthusiast, this manual provides the knowledge and guidance you need to keep your W126 running smoothly and reliably.

The Mercedes-Benz W126, produced from 1979 to 1991, marked a significant chapter in the history of the German automaker. This luxurious and technologically advanced sedan set a new standard for comfort, safety, and engineering excellence, and it remains a highly sought-after classic car today. The W126 was available in a wide range of body styles, including the 2-door coupe, 4-door sedan, and the long-wheelbase S-Class, offering diverse options for discerning drivers. Under the hood, a variety of powerful and refined engines were offered, ranging from the fuel-efficient 3.0L straight-six to the potent 5.6L V8, all paired with robust and smooth automatic transmissions.

The W126's legacy extends beyond its powerful engine lineup and opulent interior. It was one of the first production cars to incorporate advanced safety features such as crumple zones, ABS brakes, and airbags, setting a new benchmark for passenger protection. The W126's innovative engineering was further evident in its sophisticated suspension system, which provided a comfortable yet responsive ride, and its use of high-quality materials and meticulous assembly made it a durable and long-lasting vehicle. The W126, with its iconic design and exceptional performance, solidified Mercedes-Benz's reputation for producing the world's most luxurious and technologically advanced automobiles, cementing its place in automotive history as a true masterpiece.