This comprehensive 1981 Mercedes W126 SEC Service and Repair Manual provides detailed instructions, illustrations, diagrams, and wiring schematics for all models and repairs. This manual is the exact same one used by technicians at Mercedes dealerships to maintain, service, diagnose, and repair your vehicle. You'll find complete step-by-step instructions for all aspects of your vehicle's repair, making it easy to work on your own car.

The manual covers a wide range of topics including maintenance, engine, control system, mechanical components, fuel service specifications, emission control, intake exhaust cooling, lubrication, ignition starting charging, automatic and manual transmission, transfer propeller shaft, drive shaft, differential, axle suspension, tire and wheel, brake control, parking brake, steering column, power steering, air conditioning, supplemental restraint system, seat belt, engine immobilizer, cruise control, wiper and washer, door lock, meter audio/visual, horn, windshield/glass mirror, instrument panel, seat, engine hood/door, exterior and interior, electrical, multiplex/CAN communication, and much more.

This manual is designed for easy use. Print the pages and diagrams you need, taking them directly to your vehicle or workshop. You can even enlarge images and print them off at a larger size for greater detail.

The 1981 Mercedes-Benz W126 SEC, a true icon of automotive luxury and engineering, was a game-changer in the coupe market. This "Sonderklasse" model, as its name implies, represented the pinnacle of Mercedes-Benz craftsmanship at the time. The SEC, a shortened designation for "S-Klasse Coupé," was introduced with the iconic, sleek, and aerodynamically-designed bodywork, featuring a low-slung profile and gently sloping fastback roofline. This styling, a departure from the more traditional boxy coupes of the past, was a bold statement, immediately making the W126 SEC a symbol of refined taste and sophistication. The car's design was not merely aesthetic; it was meticulously engineered for optimal performance and comfort. The W126 SEC boasted a robust and reliable chassis, built with a blend of steel and aluminum, ensuring both rigidity and light weight. This, coupled with a sophisticated suspension system and powerful engine options, resulted in a driving experience that was both exhilarating and controlled.

Under the hood, the 1981 W126 SEC offered a choice of powerful and refined engines. The base model featured a 3.8-liter V8 engine, offering ample power and smooth acceleration. However, the true gem of the lineup was the 5.0-liter V8, capable of delivering a thrilling driving experience. These engines were paired with a smooth-shifting automatic transmission, providing effortless gear changes and seamless acceleration. Beyond its performance, the W126 SEC was a testament to Mercedes-Benz's commitment to luxury. The interior was a haven of opulence, featuring plush leather upholstery, rich wood trim, and an abundance of features designed to pamper occupants. From climate-controlled seats to an advanced audio system, the W126 SEC offered an unparalleled level of comfort and convenience. This attention to detail and commitment to excellence truly cemented the W126 SEC's status as a luxurious, performance-oriented coupe that continues to be admired by enthusiasts today.