This comprehensive service and repair manual is specifically designed for the 1980 Mercedes W126 SEL. It provides detailed instructions, diagrams, illustrations, wiring schematics, and specifications to cover all models and repairs. The manual is equivalent to the one used by technicians at Mercedes dealerships, enabling you to maintain, service, diagnose, and repair your vehicle effectively. Inside, you'll find step-by-step instructions for a wide range of repairs, including: * **Maintenance:** Routine maintenance tasks like oil changes, filter replacements, and fluid checks. * **Engine:** Detailed information on engine components, troubleshooting, and repair procedures. * **Control System:** Guidance on electronic control systems, sensors, and actuators. * **Mechanical:** In-depth coverage of transmission, drivetrain, suspension, and steering systems. * **Fuel Service Specifications:** Comprehensive data on fuel systems, injectors, and fuel lines. * **Emission Control:** Information on emissions components and their maintenance. * **Intake Exhaust Cooling:** Detailed instructions on air intake, exhaust, and cooling systems. * **Lube:** Specifications for lubricants and recommended fluids for various components. * **Ignition Starting Charging:** Repair instructions for ignition, starting, and charging systems. * **Auto Transmission Clutch:** Detailed information on automatic transmission operation and repair. * **Manual Transmission:** Guidance on manual transmission operation and repair. * **Transfer Propeller Shaft:** Repair procedures for the transfer case and propeller shaft. * **Drive Shaft:** Comprehensive information on drive shaft components and repair. * **Differential:** Detailed instructions on differential operation and repair. * **Axle Suspension:** Coverage of axle and suspension components, troubleshooting, and repair. * **Tire & Wheel:** Information on tire selection, maintenance, and wheel repair. * **Brake Control:** Guidance on brake control systems and electronic components. * **Brake:** Detailed instructions on brake system components, repair, and maintenance. * **Parking Brake:** Information on parking brake operation and repair. * **Steering Column:** Repair procedures for steering column components. * **Power Steering:** Detailed information on power steering systems and troubleshooting. * **Air Condition:** Guidance on air conditioning system operation and repair. * **Suppl Restraint System:** Information on safety systems and components. * **Seat Belt:** Instructions on seat belt system components and repair. * **Engine Immobilizer:** Guidance on anti-theft systems and components. * **Cruise Control:** Repair procedures for cruise control systems. * **Wiper & Washer:** Information on wiper and washer system operation and repair. * **Door Lock:** Guidance on door lock systems and repair. * **Meter Audio/Visual:** Detailed instructions on instrument panel and audio-visual system repair. * **Horn:** Repair procedures for the horn system. * **Windshield/Glass Mirror:** Information on windshield, glass, and mirror replacement. * **Instrument Panel:** Detailed instructions on instrument panel components and repair. * **Seat:** Guidance on seat system components and repair. * **Engine Hood/ Door:** Information on engine hood and door operation and repair. * **Exterior & Interior:** Repair procedures for exterior and interior components. * **Electrical:** Detailed coverage of electrical system components, wiring diagrams, and troubleshooting. * **Multiplex/ Can Communication:** Information on communication systems and networks. This comprehensive manual will help you gain the knowledge and confidence to repair your 1980 Mercedes W126 SEL.

The 1980 Mercedes-Benz W126 SEL, a luxurious and technologically advanced sedan, marked a significant leap forward in automotive engineering and design. This model, part of the W126 series produced from 1979 to 1991, epitomized the brand's commitment to quality, durability, and comfort. The SEL designation stood for "Sonderklasse Lang," signifying its extended wheelbase and spacious interior. The W126 SEL was available with a range of powerful and refined engines, including the fuel-injected 3.8-liter inline-six and the iconic 5.0-liter V8, both renowned for their smooth operation and ample power. Its exterior featured a distinctive, angular design, characterized by its prominent grille, flowing lines, and distinctive rear window. Inside, the W126 SEL offered a luxurious ambiance with plush leather seats, wood trim, and a host of modern amenities, including power windows, air conditioning, and an advanced sound system. The 1980 Mercedes-Benz W126 SEL was lauded for its exceptional build quality, robust engineering, and remarkable safety features. Its unibody construction, coupled with a sophisticated suspension system, provided a smooth and confident ride, while its numerous safety innovations, such as crumple zones and anti-lock brakes, set new standards for passenger protection. The W126 SEL also incorporated advanced technology for its time, including electronic fuel injection, a digital instrument cluster, and an optional electronic climate control system. Its reputation for reliability and longevity cemented its status as a highly sought-after classic, particularly among enthusiasts who appreciate its timeless elegance and engineering prowess. The 1980 Mercedes-Benz W126 SEL, a testament to the brand's engineering excellence, continues to captivate car enthusiasts worldwide, serving as a reminder of the innovative spirit that defined the golden age of German automotive engineering.