This comprehensive service and repair manual for the 1989 Mercedes W126 SEC covers all models and repairs in detail. It is the same manual utilized by Mercedes technicians at dealerships for maintaining, servicing, diagnosing, and repairing your vehicle.

Within this manual, you'll find complete step-by-step instructions, detailed diagrams, illustrations, wiring schematics, and specifications to help you confidently repair your car.

The manual covers a wide array of topics, including:

* **Maintenance:** Routine maintenance procedures for keeping your vehicle in optimal condition.
* **Engine:** Information on engine repair and rebuild, including details on fuel systems, emission controls, cooling systems, lubrication, ignition, and starting systems.
* **Transmission:** Covers both automatic and manual transmissions, including clutches, transfer cases, driveshafts, differentials, and axles.
* **Suspension:** Information on suspension components, including tires, wheels, brakes, steering, and power steering.
* **Air Conditioning:** Guidance on troubleshooting and repairing air conditioning systems.
* **Electrical System:** Covers the electrical system in detail, including wiring schematics, multiplex communications, and troubleshooting guides for various electrical components.
* **Interior and Exterior:** Provides information on repairing interior and exterior components, including seats, door locks, windows, mirrors, and more.
* **Safety Systems:** Includes information on seat belts, airbags, and anti-theft systems.

This manual provides the essential information you need to confidently service and repair your 1989 Mercedes W126 SEC.

The 1989 Mercedes W126 SEC, a true icon of the automotive world, stands as a testament to German engineering excellence and luxury. This grand tourer, unveiled in 1981 and produced until 1991, captivated automotive enthusiasts with its sleek coupé styling, powerful engines, and opulent interior. The 'SEC' designation, derived from 'S-Klasse Coupé,' aptly describes its elegant and sporty nature. The W126 platform, known for its durability and advanced technology for its time, provided the foundation for the SEC. Its distinctive low-slung profile, characterized by a long hood, short overhangs, and a gracefully sloped roofline, exuded an air of sophistication and athleticism.

The SEC was available with a range of powerful engines, including the renowned 5.0-liter V8 and the potent 5.6-liter V8, coupled with a smooth and efficient automatic transmission. The car's performance was matched by its luxurious interior, boasting premium materials, advanced amenities, and meticulous craftsmanship. Features such as power-adjustable seats, air conditioning, a premium sound system, and a well-appointed dashboard contributed to an unparalleled driving experience. The 1989 SEC, in particular, benefitted from a range of upgrades, including improved suspension and drivetrain components, further enhancing its performance and refinement. These attributes, along with the enduring appeal of its timeless design, have cemented the W126 SEC's reputation as a classic collectible, sought after by enthusiasts worldwide.