🏷️ Basic Information Identification Make: Mercedes-Benz Model: W126 SEL Year: 1983 Codes Chassis Code: W126 Body Style Code: SEL (Long Wheelbase Sedan) 👋 Introduction Market Position Target Audience: Mercedes-Benz W126 SEL owners and independent repair technicians seeking authoritative, dealership-level repair information. Competitive Analysis Value Proposition: Offers significant cost savings and empowers users to perform repairs themselves, avoiding reliance on expensive dealership labor. Emphasizes vehicle specificity over generic repair guides. Key Features Digital Convenience: Single, easy-to-use PDF manual with search functionality, printable pages for field use, and no risk of physical damage or loss. Diagnostic Capability: Enables users to diagnose and repair complex issues effectively due to the depth of information provided. 📋 Manual Details Coverage Areas Coverage: All W126 SEL models manufactured in 1983, comprehensive A-Z repairs. Page Count Page Count: Not specified, but described as 'complete' and 'everything you will ever need'. Manual Type Manual Type: Service and Repair Manual (Factory Level) Language Language: English Format Format: Digital PDF 📖 Manual Coverage Systems Covered Engine: Detailed coverage including engine mechanicals, fuel system, emission control, lubrication, cooling, ignition, starting, and charging systems. Transmission: Comprehensive coverage of automatic transmissions and manual transmissions (if applicable to SEL variants), including clutch operation and service. Drivetrain: Includes transfer case, propeller shaft, drive shafts, differential, and axle/suspension systems. Brakes: Detailed information on brake control systems, hydraulic brakes, and parking brake mechanisms. Steering: Covers steering column components and power steering systems. Electrical: Extensive electrical system coverage including wiring schematics, lighting, instrumentation, meters, audio/visual systems, horns, and accessory controls. Climate Control: In-depth coverage of the air conditioning system and related components. Body And Interior: Includes coverage of doors, locks, engine hood, exterior and interior trim, glass, mirrors, seats, and instrument panel. Safety Features: Information on supplementary restraint systems (airbags, if equipped), seat belts, and engine immobilizer systems. Driver Systems: Details on cruise control, wiper and washer systems. Procedures Included Maintenance: Complete routine maintenance procedures, fluid changes, filter replacements, and tune-ups. Diagnostics: Systematic diagnostic procedures for identifying and resolving various faults and malfunctions. Repair: Step-by-step instructions for all mechanical and electrical repairs, from minor adjustments to major component overhauls. Troubleshooting: Integrated troubleshooting guides and symptom-based problem resolution. Technical Specifications: Inclusion of all necessary technical specifications, torque values, clearances, and tolerances for accurate repair. Technical Depth Depth: Factory-level, highly detailed, covering all aspects of maintenance, service, diagnosis, and repair. Visual Aids: Numerous diagrams, illustrations, and wiring schematics to facilitate understanding and execution of repairs. 📊 Manual Specifications File Format File Format: PDF Print Quality Print Quality: Printable pages with high-resolution diagrams and illustrations, allowing for enlargement. Binding Type Binding Type: Digital (N/A for physical binding), but designed for print-on-demand. Paper Type Paper Type: N/A (Digital format), but printable on standard paper. Compatibility Operating Systems: Windows (Vista 32/64, XP, ME, 98, NT, 2000) and Mac compatible. Requirements Software Requirements: Adobe PDF Reader and WinZip (free online). ⚙️ Engine Specifications Primary Engine Engine Type: V8 (likely M116 or M117 family, specific displacement not detailed in product info but typically 3.8L or 5.0L for W126 SEL). Performance Horsepower: Typical for 1983 W126 SEL would range from approximately 155 hp (3.8L) to 230 hp (5.0L), depending on exact engine variant and market. Torque: Torque figures vary by engine size but generally provide strong low-end grunt characteristic of Mercedes-Benz V8s of the era. Fuel System Fuel Injection: Bosch K-Jetronic (CIS) mechanical fuel injection is highly probable for 1983 models, with some later models potentially featuring electronic fuel injection (EFI). 🔧 Transmission Standard Transmission Type: Automatic Transmission (likely a 4-speed, e.g., 4G-TRONIC). Optional Optional Transmission: Manual transmissions were rarely optioned on the SEL long-wheelbase models, but if available, would be a 4 or 5-speed manual. Features Transmission Fluid: Requires specific Automatic Transmission Fluid (ATF) meeting Mercedes-Benz specifications (e.g., Dexron II or equivalent). 📐 Dimensions Exterior Wheelbase: Extended wheelbase for the SEL model, significantly longer than the standard W126 sedan, offering increased rear passenger legroom. Weights Curb Weight: Typically over 4,000 lbs (1800 kg) due to the extended wheelbase and V8 engine. 🛡️ Safety Features Ratings Safety Standards: Designed to meet or exceed automotive safety standards of the early 1980s, with a focus on structural integrity and occupant protection. Active Features Active Safety: ABS (Anti-lock Braking System) was an available option on higher-end W126 models, and highly recommended for this era. Passive Features Passive Safety: Reinforced safety cage, crumple zones, padded interior surfaces, and advanced (for the time) seat belt systems. 💡 Technology Features Infotainment Audio System: Factory-fitted radio/cassette player with potential for premium sound options. Manual covers basic operation and potentially troubleshooting. Driver Assistance Cruise Control: System covers the operation, maintenance, and repair of the vehicle's cruise control system. Connectivity Multiplex Communication: Limited 'Multiplex/CAN Communication' as understood in modern vehicles. However, it may cover diagnostic data transfer or early forms of electronic communication between modules,...