🏷️ Basic Information Identification Make: Mercedes-Benz Model: W126 SEC Year: 1987 Body Style: Coupe 👋 Introduction Market Position Vehicle Segment: Luxury Grand Tourer Coupe Key Features Manual Purpose: To provide comprehensive, vehicle-specific repair and maintenance information for the 1987 Mercedes-Benz W126 SEC. Format Advantage: Digital PDF format offers easy navigation, searchability, and selective printing, reducing wear and tear on physical manuals. Accuracy: Authentic factory documentation used by dealership technicians, ensuring accuracy and reliability. 📋 Manual Details Coverage Areas Engine Coverage: All engine variants for 1987 W126 SEC models Transmission Coverage: Automatic Transmission (4-speed) Electrical System Coverage: Complete wiring schematics and component diagnostics Chassis Coverage: Suspension, steering, brakes, exhaust Body And Interior Coverage: Doors, windows, seats, trim, climate control Page Count Estimated Page Count: Detailed technical manual with likely hundreds of pages (specific count not provided, but implies comprehensive coverage) Manual Type Type: Factory Service and Repair Manual Language Language: English Format Digital Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, disassembly, valve train, lubrication, cooling system, fuel delivery, ignition system Engine Control System: Fuel injection system (Bosch K-Jetronic or KE-Jetronic depending on specific engine variant), ignition timing, sensor diagnostics Emission Control: Catalytic converter systems, secondary air injection, exhaust gas recirculation (if applicable) Transmission And Drivetrain: Automatic transmission service, torque converter, driveshaft, differential, rear axle assembly Suspension And Steering: Front and rear suspension, shock absorbers, springs, power steering system, steering column Brakes: Hydraulic brake system, ABS (Anti-lock Braking System), parking brake, brake fluid specifications Climate Control: Air conditioning system servicing, heater core, ventilation, refrigerant specifications Electrical Components: Lighting, wipers, washers, horn, instrumentation, power windows, central locking, cruise control Body And Trim: Door mechanisms, glass replacement, interior trim removal, exterior panel repair Procedures Included Maintenance Procedures: Regular servicing, oil changes, filter replacements, spark plug replacement, fluid checks and changes Diagnostic Procedures: Troubleshooting guides for common issues, fault code interpretation (if applicable), electrical system testing Repair Procedures: Step-by-step instructions for component removal, repair, and reinstallation Rebuild Procedures: Detailed procedures for major component overhauls (e.g., engine, transmission) Technical Depth Depth Of Information: Factory-level technical detail, including specialized tools, torque specifications, and diagnostic data 📊 Manual Specifications File Format File Type: PDF Print Quality Printability: Fully printable, allowing users to select and print specific pages or diagrams Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) Compatibility Software Requirements: Adobe PDF Reader, Winzip (or similar decompression utility) Operating Systems: Windows (Vista 32/64, XP, ME, 98, NT, 2000) and Mac compatible ⚙️ Engine Specifications Primary Engine Engine Code Example: M116 (3.0L V8) or M117 (4.2L or 5.0L V8) - specific to 1987 SEC models Engine Type: V8, naturally aspirated Performance Horsepower Range Example: Approximately 180-230 hp (depending on engine size and market configuration) Torque Range Example: Approximately 230-330 lb-ft (depending on engine size and market configuration) Fuel System Fuel Injection System: Bosch K-Jetronic or KE-Jetronic mechanical fuel injection Fluid Specifications Engine Oil Type: API SG or higher, viscosity SAE 15W-40 or 10W-40 (check manual for exact specification for given climate) Coolant Type: Mercedes-Benz Approved Antifreeze/Coolant (e.g., G48, a silicate-free OAT coolant) 🔧 Transmission Standard Transmission Type: 4-speed Automatic Transmission (e.g., 722.3) Features Shift Modes: Comfort/Sport modes (depending on model year and specific transmission variant) Fluid Specifications Transmission Fluid Type: MB 236.1 or MB 236.3 Automatic Transmission Fluid (ATF), typically Dexron-II compatible variants 📐 Dimensions Exterior Length Example: Approximately 197 inches Width Example: Approximately 70.5 inches Height Example: Approximately 55 inches Weights Curb Weight Example: Approximately 3,700 - 4,000 lbs 🛡️ Safety Features Passive Features Airbags: Driver's side airbag typically standard, passenger airbag optional or not available on all 1987 models Seat Belts: 3-point seat belts front and rear, with pre-tensioners for front occupants Active Features ABS: Anti-lock Braking System (ABS) available/standard depending on model variant Traction Control: Acceleration Skid Control (ASR) not typically standard on 1987 models, but may be present on later W126 variants 💡 Technology Features Infotainment Audio System: Factory premium sound system with AM/FM radio and cassette player, optional CD changer Driver Assistance Cruise Control: Standard cruise control system Comfort Features Climate Control: Automatic climate control with electronic temperature regulation Seats: Power-adjustable front seats with memory function, heated seats optional 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000-7,500 miles or 12 months, whichever comes first (consult specific manual for exact recommendation) Major Service Interval: Major inspections and fluid changes often recommended around 15,000-30,000 miles Fluid Specifications Brake Fluid Type: DOT 4 Power Steering Fluid: MB 236.3 or equivalent hydraulic fluid Known Issues Common Wear Items: Fuel distributor seals, vacuum lines, transmission detent star, climate control O-rings, blower motor resistors, window regulators Electrical Concerns: Wiring harness degradation (especially insulation on ignition wires), headlight switch failures Engine Performance Issues: Hesitation or rough running due to aging K-Jetronic fuel system components, incorrect fuel pressure 📚 Vehicle History Brand...