🏷️ Basic Information Identification Make: Mercedes-Benz Model: W126 Series Model Variants Covered: 300SD, 300SDL, 300 SE, 300 SEL, 350 SD, 350 SDL, 380 SE, 380 SEL, 380 SEC, 420 SEL, 500 SEL, 500 SEC, 560 SEL, 560 SEC Production Years: 1981-1991 Generation Generation Code: W126 Codes Chassis Code: W126 👋 Introduction Market Position Target Audience: Mercedes-Benz W126 owners, DIY mechanics, professional technicians, restoration specialists Competitive Analysis Value Proposition: Provides professional-level diagnostic and repair information, equivalent to factory service manuals, at a fraction of the cost and with enhanced digital accessibility. Key Features Digital Format Benefits: Searchable, printable, indexed, and easily replaced due to wear and tear compared to physical manuals. Data Size: 1.3GB (indicates a very comprehensive and detailed data set) 📋 Manual Details Coverage Areas Manual Scope: Comprehensive repair, maintenance, rebuilding, refurbishment, and restoration Page Count Estimated Page Count: Likely exceeds 1000 pages given file size and detail level (specific count not provided, but estimated based on content scope) Manual Type Manual Type: Workshop Repair Service Manual Language Language: English (implied by content and sales description) Format Digital Format: PDF/EXE/ISO (downloadable) 📖 Manual Coverage Systems Covered Engine Systems: Engine mechanical, lubrication, cooling, control, fuel, exhaust Transmission Drivetrain: Clutch, manual transaxle, automatic transaxle, front axle, rear axle, driveshaft, differentials Suspension Steering Brakes: Front suspension, rear suspension, road wheels & tires, brake system, parking brake system, brake control system, power steering system, steering system Body Interior Restraints: Body, lock & security system, glasses, window system & mirrors, roof, exterior & interior trim, instrument panel, seats, seat belts, supplemental restraint system (SRS) Electrical HVAC: Air conditioner system, wiring diagrams, starting & charging system, lighting system, driver information system, wiper, washer & horn, body control system, LAN system, audio visual, navigation & telephone system, auto cruise control system, power supply, ground & circuit elements Procedures Included Repair Procedures: All diagnostic and repair procedures covered in great detail, from A-Z Maintenance Procedures: Detailed maintenance schedules and procedures Rebuilding Refurbishment: Procedures for rebuilding and refurbishing major components and systems Technical Depth Diagnostic Capabilities: Advanced diagnostic procedures suitable for professional technicians Component Level Repair: Detailed instructions for component removal, disassembly, inspection, repair, and reassembly Wiring Diagrams: Comprehensive electrical wiring diagrams included 📊 Manual Specifications File Format Primary File Type: PDF (searchable, printable, indexed) Other Formats: EXE, ISO (potential executable or disc image versions) Print Quality Image Quality: High Quality Photos, Illustrations And Diagrams Binding Type Binding: Not Applicable (Digital Download) Paper Type Paper Quality: Not Applicable (Digital Download) Compatibility Operating System: All Versions of Windows Requirements Software Requirements: PDF Reader, Flash Player, Internet Explorer browser Usability User Friendliness: Easy to use, no advanced computer skills required Searchability Indexing: Indexed for quick information retrieval ⚙️ Engine Specifications Primary Engine Engine Displacements And Codes: Various, including M102 (2.3-3.0L I4), M103 (2.6-3.0L I6), M110 (2.8L I6), M116/M117 (3.8L, 4.2L, 5.0L V8), M117 (5.6L V8) Engine Types Engine Configurations: Inline-4, Inline-6, V8 Performance Horsepower Torque: Varies by engine model and year (e.g., 560SEL M117 engine produced approximately 238 hp and 300 lb-ft of torque). Fuel System Fuel Injection Systems: Bosch K-Jetronic (CIS), Bosch KE-Jetronic (CIS-E), Bosch Motronic (for later V8 and some 6-cylinder models) Engine Management Engine Control Units: Various Bosch ECUs depending on engine and year, managing fuel injection, ignition timing, and emissions. 🔧 Transmission Standard Transmission Options: Primarily 4-speed and 5-speed automatic transmissions (e.g., 722.3, 722.4, 722.5 series). Optional Manual Transmission: Rarely offered, primarily on select coupes (SEC) or specific export markets. The manual is less common than the automatic. Features Automatic Transmission Features: Hydromechanical control, Lock-up torque converter for improved efficiency on some models. 📐 Dimensions Exterior Body Styles: Sedan (W126) and Coupe (C126 SEC) Wheelbase: Standard wheelbase (approx. 114.7 inches) and Long Wheelbase (SEL models, approx. 119.7 inches) Weights Curb Weight: Varies significantly by model, typically ranging from approximately 3,600 lbs to over 4,200 lbs. 🛡️ Safety Features Ratings Crash Safety: Designed to meet stringent safety standards of its era, featuring a robust body structure, crumple zones, and reinforced A/B pillars. Specific crash test ratings from modern standards are not applicable but it was considered very safe for its time. Active Features Braking Systems: Anti-lock Braking System (ABS) became standard on most models during its production run. Passive Features Restraint Systems: Seat belts (three-point front and rear), optional driver's side airbag (introduced in later years), reinforced safety cell. 💡 Technology Features Infotainment Audio Systems: Original Becker or Blaupunkt radio/cassette units, some with integrated amplifiers or multi-speaker systems. Driver Assistance Cruise Control: Standard 'Tempomat' cruise control system available on most models. Connectivity Early Car Phones: Optional provision for early analog car phones on some higher-spec models. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 7,500 - 10,000 miles or annually, depending on driving conditions and specific engine oil used (check manual for exact specs). Major Service...