This comprehensive 1989 Mercedes W126 SEL Service and Repair Manual is your ultimate guide to maintaining, servicing, diagnosing and repairing your vehicle. It provides the same detailed information used by technicians at Mercedes dealerships, ensuring you have access to the most accurate and complete repair instructions.

The manual covers every aspect of your vehicle, from basic maintenance to complex repairs. You'll find detailed step-by-step instructions, clear diagrams and illustrations, wiring schematics, and specifications for all components. This information will empower you to confidently tackle any repair, whether it's a simple oil change or a more involved engine overhaul.

The manual covers a wide range of topics, including:

* **Maintenance:** Regular maintenance schedules, fluid checks, and replacement procedures.
* **Engine:** Detailed information on engine components, diagnostics, and repair procedures, including fuel systems, emissions control, cooling systems, and lubrication.
* **Transmission:** Guidance on transmission types, operation, and repair, covering both manual and automatic transmissions.
* **Drivetrain:** Complete coverage of axles, drive shafts, differentials, and suspension systems.
* **Brakes:** In-depth information on brake systems, including disc and drum brakes, ABS, and parking brakes.
* **Steering:** Comprehensive information on steering systems, including power steering, steering columns, and steering components.
* **Electrical System:** Detailed wiring diagrams and explanations of electrical components, including the multiplex system, CAN communication, and electrical troubleshooting.
* **Climate Control:** Complete guidance on air conditioning systems, including diagnostics, repair, and maintenance.
* **Body and Interior:** Information on bodywork, interior components, and trim, including door locks, seats, and window systems.
* **Safety Systems:** Coverage of safety features like airbags, seat belts, and anti-theft systems.

With this manual, you'll have all the information you need to keep your 1989 Mercedes W126 SEL in top condition. No more relying on expensive mechanics for simple repairs. You can confidently handle most repairs yourself, saving both time and money.

The 1989 Mercedes-Benz W126 SEL, a pinnacle of luxury and engineering in its time, stands as a testament to the German automaker's commitment to excellence. This model, part of the W126 generation introduced in 1979, represented an evolution in Mercedes' flagship sedan lineup. The SEL, signifying "Sonderklasse Limousine" (Special Class Limousine) in German, denoted its premium positioning within the W126 range. The 1989 model year witnessed subtle refinements and enhancements to the already impressive W126, including a redesigned grille, revised interior trim, and updated engine options.

Underneath its sleek aerodynamic bodywork lay a robust and sophisticated mechanical foundation. The W126 SEL was available with a range of powerful gasoline engines, including the ubiquitous M117 5.0L V8 and the more potent M119 5.6L V8. These engines were renowned for their smooth power delivery, durability, and refined operation, hallmarks of Mercedes engineering. The W126 SEL further exemplified Mercedes' commitment to safety with its comprehensive suite of features, including anti-lock brakes (ABS), crumple zones, and reinforced passenger compartments. While the W126 SEL was known for its opulence and luxurious appointments, it also showcased a level of mechanical sophistication and engineering prowess that solidified its position as a benchmark car of its era.