The Mercedes-Benz W126 Workshop Service Repair Manual, covering model years 1981-1991, is a comprehensive resource for anyone seeking to maintain, repair, rebuild, refurbish, or restore their classic Mercedes-Benz W126. This detailed manual, identical to the one used by mechanics in dealerships, provides in-depth information and guidance for a wide range of tasks. It covers all models and engine types within the W126 series, including the 300 SD, 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.

It features detailed illustrations, diagrams, specifications, and wiring schematics, all accompanied by step-by-step instructions, making even intricate repairs manageable. The manual facilitates a wide array of maintenance and repair operations. From engine overhauls and rebuilding to brake servicing, sunroof repair, timing belt replacement, and transmission removal and installation, this resource provides a complete guide.

You'll find extensive troubleshooting and diagnostics sections, including computer diagnostic trouble tree charts, for resolving engine performance issues. Front-end and alignment procedures and specifications are included, as well as comprehensive information on suspension maintenance. The manual also covers air conditioning service and capacities, transmission in-car servicing, computer diagnostic codes, firing orders, detailed specifications for each model, factory maintenance schedules and charts, serpentine belt routings with 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, vacuum diagrams, and much more.

The Mercedes-Benz W126, produced from 1979 to 1991, represents a pivotal point in the history of the renowned German automaker. This generation of the S-Class, Mercedes-Benz's flagship sedan, redefined luxury and engineering prowess. The W126 marked a significant departure from its predecessors, incorporating numerous innovations that would become hallmarks of the S-Class legacy. These included a meticulously engineered unibody construction for exceptional rigidity and safety, advanced suspension systems featuring self-leveling air suspension and anti-dive/anti-squat geometry for unmatched ride comfort and handling, and a wide array of powerful and refined engines, including the legendary M117 5.0-liter V8 and the M119 5.6-liter V8. The W126 also introduced cutting-edge features like an optional electronic climate control system, power-adjustable seats with memory function, and an advanced onboard computer system for enhanced convenience and driver information.

Beyond its technological advancements, the W126 exuded an aura of timeless elegance. Its clean, angular lines, large grille, and prominent hood emphasized its stately presence, while the opulent interior featured premium materials, meticulous craftsmanship, and a focus on driver comfort and convenience. The W126's enduring appeal transcends its era, with its legendary reliability, refined performance, and timeless aesthetic ensuring its status as a classic among automotive enthusiasts. This coveted vehicle continues to be sought after for its combination of luxury, engineering prowess, and enduring elegance, solidifying its place as a true icon of automotive design and sophistication. The W126 Workshop Service Repair Manual serves as a comprehensive guide for mechanics and enthusiasts alike, providing detailed information on every aspect of this iconic vehicle, from routine maintenance to complex repairs.