🏷️ Basic Information Identification Make: Mercedes-Benz Model: W126 SEC Year: 1982 Generation Chassis Code: W126 Model Designation: SEC (Sonderklasse Einspritzmotor Coupe) 👋 Introduction Market Position Target Audience: Mercedes-Benz W126 SEC owners, independent repair shops, automotive enthusiasts. Value Proposition: Authentic factory information for accurate diagnosis and repair, saving time and money. Competitive Analysis Competitor Manuals: Offers superior detail and accuracy compared to generic repair guides. Key Features Key Features: Vehicle-specific, step-by-step instructions, diagrams, schematics, comprehensive coverage. 📋 Manual Details Coverage Areas Vehicle Coverage: All W126 SEC models and variants for the 1982 model year. Page Count Estimated Page Count: Varies by specific model/engine, but extensive, covering A-Z repairs. Manual Type Type: Factory Service and Repair Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul, timing, lubrication, cooling, fuel injection. Engine Control: Fuel injection system (K-Jetronic), ignition system, diagnostics. Transmission: Automatic transmission service, repair, and specifications. Brakes: Hydraulic brake system, parking brake, ABS (if equipped). Suspension Steering: Front and rear suspension, power steering system, alignment. Electrical System: Complete wiring schematics, component testing, diagnostics, lighting, instrumentation. Climate Control: Air conditioning system service and repair, heating. Body Interior: Exterior body panels, doors, windows, interior trim, seats. Fuel Emissions: Fuel system, emission control systems, catalytic converter information. Drive Shaft Axle: Rear-wheel drive system, differential, drive axles, universal joints. Tire Wheel: Wheel and tire specifications, mounting, balancing. Lighting: Headlights, taillights, interior lighting, and their electrical circuits. Wiper Washer: Windshield wiper and washer system operation and repair. Instrumentation: Instrument cluster operation, gauge diagnostics, warning lights. Security: Door locks, central locking system, ignition switch operation. Restraint Systems: Seat belt mechanisms, pre-tensioners (if applicable to the specific 1982 model), supplementary restraint systems (airbags were not standard on this model). Procedures Included Maintenance: Routine maintenance schedules, fluid changes, filter replacements. Diagnostics: Troubleshooting guides, fault code interpretation (if applicable), component testing. Repair: Step-by-step repair procedures for all major systems. Rebuilds: Complete engine and transmission rebuild instructions. Adjustments: Carburetor/fuel injection adjustments, valve adjustments, timing adjustments. Installation: Component replacement and installation procedures. Technical Depth Depth: Comprehensive, from basic maintenance to full engine and transmission overhauls. Detail Level: Factory-level detail with diagrams, illustrations, and specifications. 📊 Manual Specifications File Format File Format: PDF Readability: Searchable text, high-resolution images. Print Quality Printability: All pages printable, ability to enlarge images for detailed viewing. Binding Type Binding Type: Digital (No physical binding) Paper Type Paper Type: N/A (Digital Format) Compatibility Operating Systems: Windows (Vista, XP, ME, 98, NT, 2000), macOS. Software Requirements: Adobe PDF Reader, Winzip (or equivalent). ⚙️ Engine Specifications Primary Engine Engine Code: Likely M110 (2.8L) or M116 (3.8L) or M117 (5.0L) depending on specific SEC model within 1982. Engine Type: Inline-6 (M110) or V8 (M116, M117) Performance Horsepower Range: Approximately 155 HP (M110) to 230 HP (M117 5.0L). Torque Range: Approximately 177 lb-ft (M110) to 270 lb-ft (M117 5.0L). Fuel System Fuel Injection: Bosch K-Jetronic (CIS - Continuous Injection System) Fuel Type: Unleaded Gasoline Cooling System Cooling Type: Water-cooled 🔧 Transmission Standard Transmission Type: 4-speed Automatic (e.g., 722.3) Optional Optional Transmission: Not typically offered for SEC models of this era, primarily automatic. Features Transmission Features: Hydraulic control, torque converter, possible sport/economy modes. 📐 Dimensions Exterior Body Style: 2-door Coupe Wheelbase: Approximately 116.7 inches (2965 mm) Length: Approximately 196.4 inches (4988 mm) Width: Approximately 70.5 inches (1790 mm) Height: Approximately 55.3 inches (1405 mm) Weights Curb Weight: Approximately 3900-4200 lbs (1770-1905 kg) depending on engine and options. 🛡️ Safety Features Ratings Safety Design: Built to high Mercedes-Benz safety standards of the era, including a strong unibody structure. Active Features Active Safety: Four-wheel disc brakes, power steering, advanced suspension geometry for its time. Passive Features Passive Safety: Reinforced passenger cell, energy-absorbing steering column, padded interior surfaces. 💡 Technology Features Infotainment Infotainment Features: Period-appropriate AM/FM radio with cassette player, potentially power antenna. Driver Assistance Driver Assistance: Limited by modern standards. ABS may have been optional on some models. Cruise control. Connectivity Connectivity Features: N/A (No modern connectivity features like Bluetooth or USB). 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000-5,000 miles (5,000-8,000 km) or annually. Major Service Interval: Significant service intervals around 30,000-60,000 miles (50,000-100,000 km) for tune-ups, fluid flushes, belt inspections. Fluid Specifications Engine Oil Type: API SG/SH, SAE 15W-40 or 10W-40 (check specific owner's manual for exact viscosity and specs). Coolant Type: Ethylene glycol-based coolant, typically a 50/50 mix with distilled water. Mercedes-specific coolant recommended. Transmission Fluid Type: Dexron II or equivalent ATF (Automatic Transmission Fluid). Known Issues Common Issues Overview: Electrical gremlins, fuel distributor wear (K-Jetronic), vacuum hose deterioration, window regulator issues, rust in common areas (wheel wells, rocker panels). Engine Management Issues: Warm-up regulator (WUR) issues, cold start valve problems, fuel accumulator leaks. Body Issues: Door seal leaks leading to water ingress, headliner sagging, dashboard cracks. 📚 Vehicle History Brand Heritage Brand Legacy:...