This comprehensive 1985 Mercedes W126 SEC Service and Repair Manual provides you with the exact same information used by technicians at dealerships to maintain, service, diagnose, and repair your vehicle. It covers all models and repairs from A to Z, offering detailed instructions, diagrams, illustrations, wiring schematics, and specifications for every aspect of your car. This manual is your one-stop resource for all your vehicle's repair needs.

Experience detailed step-by-step instructions, allowing you to perform repairs with ease and confidence. Navigate clearly with diagrams and illustrations that visually guide you through every process. Unravel complex electrical systems with comprehensive wiring schematics that make troubleshooting a breeze. Gain access to precise specifications for all components, ensuring accurate repairs and proper maintenance.

This manual covers a wide range of topics, including:

* **Maintenance:** Regular upkeep is essential for prolonging your vehicle's life. This section provides you with everything you need to keep your W126 SEC running smoothly.
* **Engine:** Explore the intricacies of your engine, from its basic operation to intricate components like the fuel system, emissions control, and cooling system.
* **Control System:** Understand how your vehicle's electronic systems operate, including its control units, sensors, and actuators.
* **Mechanical:** Dive into the mechanical aspects of your car, covering the transmission, drivetrain, suspension, and more.
* **Fuel Service Specifications:** Find detailed information on fuel types, injection systems, and other fuel-related components.
* **Emission Control:** Learn about the systems that ensure your vehicle meets environmental regulations.
* **Intake Exhaust Cooling:** Uncover the essential components responsible for managing engine temperature and emissions.
* **Lube:** Get the right lubrication information for all your vehicle's critical parts.
* **Ignition Starting Charging:** Master the intricacies of your car's ignition, starting, and charging systems.
* **Auto Transmission Clutch:** Understand the operation and maintenance of your automatic transmission.
* **Manual Transmission:** If you have a manual transmission, this section provides detailed information on its operation and repair.
* **Transfer Propeller Shaft:** Learn about the components that transfer power from the engine to the wheels.
* **Drive Shaft:** Explore the drive shafts that connect the transmission to the wheels.
* **Differential:** Understand how the differential distributes power to the wheels.
* **Axle Suspension:** Gain insight into the suspension system that ensures a comfortable ride and handles road conditions.
* **Tire & Wheel:** Learn about proper tire maintenance, wheel types, and how to select the right tires.
* **Brake Control:** Explore the brake system, including the master cylinder, calipers, and other components.
* **Brake:** Discover how to inspect, maintain, and repair your brakes.
* **Parking Brake:** Learn about the parking brake system and how to troubleshoot any issues.
* **Steering Column:** Understand the workings of the steering column and its components.
* **Power Steering:** Explore the power steering system and how to diagnose and repair any problems.
* **Air Condition:** Get detailed information on the air conditioning system, including diagnosis and repair procedures.
* **Suppl Restraint System:** Learn about the supplemental restraint systems, including airbags and seatbelts.
* **Seat Belt:** Understand the seatbelt system and how to ensure it functions properly.
* **Engine Immobilizer:** Explore the anti-theft immobilizer system and its operation.
* **Cruise Control:** Learn about the cruise control system and how to troubleshoot any issues.
* **Wiper & Washer:** Discover information on the windshield wiper and washer system.
* **Door Lock:** Understand the door locking mechanisms and how to repair them.
* **Meter Audio/Visual:** Explore the instrument cluster, gauges, and other audio/visual displays.
* **Horn:** Learn about the horn system and how to diagnose and repair any problems.
* **Windshield/Glass Mirror:** Gain information on the windshield, windows, and mirrors.
* **Instrument Panel:** Explore the instrument panel and its components.
* **Seat:** Understand how the seats function and how to address any issues.
* **Engine Hood/Door:** Learn about the engine hood and doors and how to repair them.
* **Exterior & Interior:** Find detailed information on the car's exterior and interior components.
* **Electrical:** Explore the electrical system, including wiring diagrams and troubleshooting tips.
* **Multiplex/Can Communication:** Understand the multiplex and CAN communication networks within your vehicle.
* **And much more...**

This manual is an indispensable resource for anyone who wants to perform their own repairs and maintenance on their 1985 Mercedes W126 SEC. Whether you are a seasoned mechanic or a novice, this comprehensive manual will empower you with the knowledge and tools to keep your car running smoothly.

The 1985 Mercedes-Benz W126 SEC, a model that epitomized the opulent and luxurious automotive landscape of the 1980s, was a true masterpiece of German engineering. This coupe, aptly named "SEC" for "Sportliches Coupé," was the pinnacle of refinement and performance, built upon the foundation of the W126 S-Class sedan platform. Its sleek, aerodynamic design, characterized by its long, sweeping lines and distinctive pop-up headlights, turned heads wherever it went. Beneath the hood, a variety of powerful engines, including the legendary 5.0-liter V8 and the potent 5.6-liter V8, provided exhilarating performance and effortless cruising. The SEC's interior was a haven of luxury, boasting rich leather upholstery, opulent wood trim, and a comprehensive array of comfort and convenience features. From its advanced suspension system to its meticulous attention to detail, the 1985 W126 SEC was a testament to Mercedes-Benz's commitment to quality and craftsmanship.

Despite its inherent sophistication, the 1985 W126 SEC, like any complex machine, required regular maintenance and occasional repairs. This is where the "1985 Mercedes W126 SEC Service and Repair Manual" comes in as an invaluable resource for owners and enthusiasts alike. This comprehensive manual, meticulously compiled by experienced technicians, served as the ultimate guide to understanding and maintaining the intricacies of this remarkable vehicle. From detailed engine diagrams and electrical schematics to step-by-step repair procedures, the manual provided all the information needed to diagnose and address any issues that might arise. With its detailed instructions and clear illustrations, it empowered owners to handle routine maintenance and even tackle more complex repairs, ensuring their SEC remained in top condition for years to come.