This comprehensive 1979 Mercedes W126 SEL Service and Repair Manual provides you with the complete information you need to maintain, service, diagnose, and repair your vehicle. This is the same manual used by technicians at Mercedes dealerships, giving you access to the same level of expertise. The manual covers all models and all repairs from A to Z. It features complete step-by-step instructions, diagrams, illustrations, wiring schematics, and specifications, making it easy for you to understand and complete repairs with confidence.

You'll find detailed information on various aspects of your vehicle, including:

* **Maintenance:** Regular maintenance schedules, fluid changes, and other essential tasks.
* **Engine:** Covers all aspects of the engine, including the fuel system, ignition system, and cooling system.
* **Control System:** Information about the electronic control systems that manage engine performance, emissions, and other vehicle functions.
* **Mechanical Components:** Detailed information on the transmission, drive shafts, axles, suspension, steering, and other mechanical systems.
* **Fuel Service Specifications:** Detailed information on fuel system components, fuel types, and fuel system troubleshooting.
* **Emission Control:** Comprehensive information on emission control systems, including diagnostic procedures and repair information.
* **Intake Exhaust Cooling:** Explanations and repair procedures for the intake and exhaust systems, including cooling components.
* **Lube:** Information on lubrication systems, types of lubricants, and maintenance schedules.
* **Ignition Starting Charging:** Details on the ignition system, starting system, and charging system, including troubleshooting and repair procedures.
* **Auto Transmission Clutch:** Information on automatic transmission operation, troubleshooting, and repair.
* **Manual Transmission:** Detailed information on manual transmission operation, troubleshooting, and repair.
* **Transfer Propeller Shaft:** Information on the transfer case, propeller shaft, and related components.
* **Drive Shaft:** Explanations and repair procedures for the drive shafts and associated components.
* **Differential:** Information on the differential, including repair procedures and troubleshooting.
* **Axle Suspension:** Covers the axle and suspension systems, including repair procedures and troubleshooting.
* **Tire & Wheel:** Information on tire and wheel selection, maintenance, and repair.
* **Brake Control:** Explanations and repair procedures for the brake control system, including ABS and other electronic systems.
* **Brake:** Detailed information on the brake system, including troubleshooting and repair procedures.
* **Parking Brake:** Information on the parking brake system, including adjustment and repair procedures.
* **Steering Column:** Detailed information on the steering column, including troubleshooting and repair procedures.
* **Power Steering:** Information on the power steering system, including troubleshooting and repair procedures.
* **Air Condition:** Information on the air conditioning system, including troubleshooting and repair procedures.
* **Suppl Restraint System:** Information on supplemental restraint systems (airbags), including troubleshooting and repair procedures.
* **Seat Belt:** Detailed information on seat belt systems, including adjustment and repair procedures.
* **Engine Immobilizer:** Information on the engine immobilizer system, including troubleshooting and repair procedures.
* **Cruise Control:** Information on the cruise control system, including troubleshooting and repair procedures.
* **Wiper & Washer:** Information on windshield wipers and washers, including troubleshooting and repair procedures.
* **Door Lock:** Information on door locks and door latches, including troubleshooting and repair procedures.
* **Meter Audio/Visual:** Information on instrument gauges, warning lights, and audio/visual systems, including troubleshooting and repair procedures.
* **Horn:** Information on the horn system, including troubleshooting and repair procedures.
* **Windshield/Glass Mirror:** Information on the windshield, windows, and mirrors, including replacement procedures.
* **Instrument Panel:** Information on the instrument panel, including removal and installation procedures.
* **Seat:** Information on vehicle seats, including adjustment and repair procedures.
* **Engine Hood/ Door:** Information on the engine hood and doors, including adjustment and repair procedures.
* **Exterior & Interior:** Information on the exterior and interior of the vehicle, including trim, upholstery, and other components.
* **Electrical:** Comprehensive information on the electrical system, including wiring diagrams, troubleshooting procedures, and repair information.
* **Multiplex/Can Communication:** Information on multiplex and CAN communication systems, including troubleshooting and repair procedures.

This manual is an invaluable resource for any owner or enthusiast looking to maintain and repair their 1979 Mercedes W126 SEL.

## The 1979 Mercedes-Benz W126 SEL: A Symbol of Luxury and Engineering Excellence

The 1979 Mercedes-Benz W126 SEL, a luxurious four-door sedan, represented the pinnacle of automotive engineering and design in its time. This generation of the S-Class marked a significant shift in Mercedes-Benz's approach to luxury car manufacturing. The W126, designed by Bruno Sacco, showcased a more aerodynamic and modern aesthetic, departing from the boxy, angular designs of its predecessors. It was the first Mercedes-Benz to feature a fully integrated, flush-mounted door handle design, a testament to the emphasis on sleekness and refinement. The car's body was built with a completely new platform, employing an innovative combination of high-strength steel and aluminum for both structural integrity and weight reduction. The W126 SEL also featured advanced suspension technology, including a newly developed independent multi-link rear suspension that offered unparalleled handling and comfort.

Beyond its sleek exterior and innovative engineering, the 1979 Mercedes-Benz W126 SEL offered an unparalleled level of luxury. From its plush leather interior to its comprehensive list of standard features, the car was designed to coddle its passengers. It was available with a range of powerful V8 engines, including the 3.5L M117 and the 4.5L M117, providing ample power and torque for effortless cruising. The W126 also featured a plethora of advanced technologies, including power-adjustable seats, a sophisticated climate control system, and an optional sunroof. Its reputation for durability and reliability cemented its status as a symbol of status and prestige, making it the preferred choice for business executives, diplomats, and discerning individuals seeking the ultimate automotive experience.