🏷️ Basic Information Identification Make: Mercedes-Benz Model: 560 SEC Year: 1987 Codes Chassis Code: C126 👋 Introduction Market Position Class: Luxury Grand Tourer Coupe Target Audience: Discerning automotive enthusiasts, owners seeking to maintain and repair their classic Mercedes-Benz. Competitive Analysis Key Competitors: BMW 7 Series Coupe (e.g., E23 based coupes), Porsche 928, Jaguar XJ-S Key Features Vehicle Attributes: V8 Engine,pillarless coupe design,luxurious interior,advanced (for its time) engineering 📋 Manual Details Coverage Areas Primary Coverage: North America (USA, Canada) Secondary Coverage: Europe, International Markets (where applicable for model year 1987) Page Count Estimated Pages: 1000+ Manual Type Type: Factory Service Repair Workshop Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine Mechanical, Engine Electrical, Fuel System, Exhaust System Drivetrain: Transmission (Automatic), Driveshaft, Differential, Axles Chassis: Suspension (Front & Rear), Steering System, Brake System Electrical: Body Electrical, Lighting, Instrumentation, HVAC Electrical, Power Accessories, Diagnostic Systems (OBD I) Body: Body Structure, Exterior Panels, Interior Trim, Glass, Doors, Hood, Trunk Procedures Included Maintenance: Scheduled Maintenance, Lubrication, Fluid Changes, Filter Replacements Repair: Component Removal and Installation, Overhaul Procedures, Component Reassembly Troubleshooting: Diagnostic Flowcharts, Symptom-Based Diagnosis, Fault Code Interpretation Technical Data: Specifications, Tolerances, Torque Values, Wiring Diagrams, Vacuum Diagrams Technical Depth Depth: Comprehensive (from basic fluid changes to complete engine/transmission rebuilds) 📊 Manual Specifications File Format File Type: PDF Print Quality Printability: High-resolution, printable pages (single or full manual) Binding Type Binding Description: Digital download, no physical binding Paper Type Paper Description: Digital, no physical paper ⚙️ Engine Specifications Primary Engine Engine Code: M117 (3.0) Engine Type: V8, SOHC, 2 valves per cylinder, Bosch K-Jetronic fuel injection Performance Displacement: 5.6 Liters (5549 cc) Bore X Stroke: 94.5 mm x 98.5 mm Compression Ratio: 8.0:1 Horsepower Net: 238 hp @ 4750 rpm (approx.) Torque Net: 335 lb-ft @ 3250 rpm (approx.) Fuel System Fuel Delivery: Bosch K-Jetronic mechanical fuel injection with Lambda control Fuel Type: Unleaded Premium Gasoline (91+ Octane) Lubrication Oil Capacity: 8.0 Liters (8.5 US Quarts) with filter Cooling Coolant Capacity: 12.0 Liters (12.7 US Quarts) 🔧 Transmission Standard Transmission Type: 4-speed Automatic (4G-TRONIC) Optional Optional Transmission: N/A (only automatic offered for 560 SEC) Features Transmission Features: Lock-up torque converter, multiple shift modes (Economy/Sport) Fluid Specs Transmission Fluid Type: MB 236.1, MB 236.2, or MB 236.4 Automatic Transmission Fluid Fluid Capacity Transmission Fluid Capacity: Approx. 8.0 Liters (for complete refill) 📐 Dimensions Exterior Length: 4960 mm (195.3 in) Width: 1810 mm (71.3 in) Height: 1390 mm (54.7 in) Wheelbase: 2800 mm (110.2 in) Weights Curb Weight: Approx. 1800 kg (3968 lbs) Gross Vehicle Weight Rating: Approx. 2300 kg (5070 lbs) Towing Capacity: Not recommended or specified 🛡️ Safety Features Ratings Crash Test Results: Detailed crashworthiness data available within factory documentation. Designed to meet safety standards of the era. Active Features ABS: Standard (Anti-lock Braking System) Traction Control: Optional (ASR - Acceleration Slip Regulation) on some late models or specific markets. Passive Features Airbags: Driver's side airbag became optional and later standard towards the end of the W126 production. Check specific vehicle. Seatbelts: 3-point inertia-reel seatbelts front and rear 💡 Technology Features Infotainment Audio System: Factory fitted Becker or Blaupunkt premium sound systems, often with cassette player and optional CD changer. Climate Control: Automatic Climate Control (ACC) with digital temperature display and recirculation function. Driver Assistance Cruise Control: Standard (Tempomat) Seat Adjustment: Electrically adjustable front seats with memory function Connectivity Connectivity Features: N/A (designed pre-modern connectivity era). Aftermarket solutions may be available. 🔧 Maintenance Service Intervals Oil Change Interval: Every 15,000 km (9,000 miles) or 12 months, whichever comes first (with synthetic oil). Transmission Fluid Change Interval: Every 50,000 km (30,000 miles) or 24 months. Coolant Change Interval: Every 40,000 km (25,000 miles) or 24 months. Fluid Specifications Engine Oil Specification: API SG/CD or ACEA A2-96 (e.g., MB 229.1 recommended for modern equivalents). Viscosity: 15W-40 or 10W-40 depending on climate. Brake Fluid Specification: DOT 3 or DOT 4 brake fluid Power Steering Fluid Specification: MB 235.10 or MB 343.0 (Dexron III equivalent for models with pump assist) Known Issues Common Problems: Fuel distributor diaphragm leaks (K-Jetronic), vacuum hose deterioration, blower motor resistor failure, differential seal leaks, timing chain tensioner wear (M117, though less prone than early M116/M117). Common Maintenance Tasks: Regular replacement of fuel filter, air filter, spark plugs (Bosch W8AC or equivalent), and ignition wires. 📚 Vehicle History Brand Heritage Heritage Summary: Mercedes-Benz has a long-standing reputation for engineering excellence, luxury, and safety, particularly with its S-Class and coupe variants. Model Evolution Model Lineage: The 560 SEC is the flagship coupe of the W126 S-Class generation, succeeding the 380 SEC and 500 SEC. It represents the pinnacle of luxury and performance in the coupe segment for its time. Production Production Years: W126 Coupe produced from 1981 to 1991. The 560 SEC specifically introduced in 1985. Manufacturing Location: Sindelfingen, Germany...