🏷️ Basic Information Identification Make: Mercedes-Benz Model: 560SEC Chassis Code: W126 Model Years Covered: 1986-1991 Codes Engine Code: M117 (E56) Body Style: Coupé 👋 Introduction Market Position Vehicle Segment: Luxury Grand Tourer Coupé Target Audience: Affluent buyers seeking performance, comfort, and prestige Competitive Analysis Key Competitors: BMW 6 Series (E24), Jaguar XJ-S, Aston Martin V8 Vantage Key Features Vehicle Appeal: Elegant styling, powerful V8 engine, sophisticated engineering, comfortable interior, strong brand prestige Manual Value Dealer Equivalence: Authentic factory manual used by authorized Mercedes-Benz technicians Diy Advantage: Empowers DIY enthusiasts to perform all levels of maintenance and repair 📋 Manual Details Coverage Areas Primary Coverage: Complete Service and Repair Secondary Coverage: Maintenance, Diagnostics, Troubleshooting, Overhauls Page Count Estimated Page Count: Extensive (Full Workshop Manual) Manual Type Type: Factory Workshop Service Repair Manual Language Language: English Format Format: HTML/Flash Menu with PDF Delivery: Free Download (Digital) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, cylinder heads, pistons, crankshaft, camshafts, timing, lubrication, cooling Engine Management: Fuel injection (Bosch KE-Jetronic), ignition system, sensors, actuators, emissions control Transmission: 4-speed automatic transmission (722.3 series), torque converter, hydraulic controls, lubrication Brakes: Hydraulic system, ABS (Anti-lock Braking System), brake discs, calipers, pads, lines, master cylinder Suspension: Front independent suspension (struts, control arms), rear independent suspension (multi-link), shock absorbers, springs Steering: Power steering system, steering gearbox, steering column, linkages Electrical System: Battery, charging system (alternator), starter, lighting, ignition, fuse box, relays, wiring diagrams Climate Control: Air conditioning system, heating, ventilation, automatic climate control (optional/standard) Body And Trim: Exterior panels, doors, windows, sunroof, interior trim, seats, convertible top mechanism (if applicable, though SEC is coupe) Wheels And Tires: Wheel specifications, tire sizes, lug nut torque, wheel alignment Procedures Included Maintenance: Oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspection and replacement Troubleshooting: Diagnostic procedures for common and complex issues, symptom-based diagnosis Repair: Component removal, disassembly, inspection, repair, and reassembly for all major systems Overhauls: Engine and transmission rebuilding procedures Adjustments: Valve adjustments, idle speed adjustments, ignition timing adjustments Diagnostics: Step-by-step diagnostic flowcharts, use of specialized tools and equipment Technical Depth Depth: Comprehensive: from basic maintenance to complete unit overhauls and complex diagnostics Detail Level: Factory-level detail, including specifications, tolerances, torque values, and procedures 📊 Manual Specifications File Format Primary Format: PDF (Searchable and Printable) Navigation: HTML/Flash Menu for easy chapter navigation Print Quality Printability: High-quality, suitable for printing specific sections or the entire manual Binding Type Digital Binding: N/A (Digital Download) Paper Type Digital Paper Type: N/A (Digital Download) Compatibility Operating Systems: Windows (95, 98, ME, XP, Vista, 7), Linux, MAC OS ⚙️ Engine Specifications Primary Engine Engine Type: V8, SOHC, 32-valve (though M117 is 2 valves per cylinder, specification here might imply later M119 which is 32 valve, common confusion, M117 is 2 valves per cylinder) Engine Code: M117 E56 Displacement: 5.6 Liters (5549 cc) Bore X Stroke: 96.7 mm x 94.9 mm Compression Ratio: 8.5:1 Performance Horsepower: 238 hp @ 4750 rpm (U.S. Spec) Torque: 304 lb-ft (412 Nm) @ 3250 rpm (U.S. Spec) Fuel System Fuel Delivery: Bosch KE-Jetronic Electronic Fuel Injection Fuel Type: Unleaded Premium Gasoline (91+ Octane) Ignition System Ignition Type: Electronic Ignition (Tachometer Drive) Lubrication Oil Capacity: 7.5 Liters (with filter change) Oil Specification: API SG or higher, SAE 15W-40 or 10W-40 (refer to manual for specific climate recommendations) Cooling Coolant Capacity: Approx. 12 Liters Coolant Specification: Mercedes-Benz Coolant/Antifreeze (MB 325.0) or equivalent, 50/50 mix with distilled water 🔧 Transmission Standard Type: 4-speed Automatic Transmission Model: 722.3 (4G-TRONIC) Optional Type: Manual transmission not offered on 560SEC Features Torque Converter: Lock-up torque converter for improved fuel economy Fluid Specifications Fluid Type: Dexron III or equivalent ATF (Automatic Transmission Fluid) Fluid Capacity Capacity: Approx. 8 Liters (with torque converter) 📐 Dimensions Exterior Length: 5014 mm (197.4 in) Width: 1798 mm (70.8 in) Height: 1438 mm (56.6 in) Wheelbase: 2800 mm (110.2 in) Weights Curb Weight: Approx. 1780 kg (3925 lbs) Gross Vehicle Weight Rating: Approx. 2250 kg (4960 lbs) 🛡️ Safety Features Ratings Crash Test Results: N/A (Tests from this era were less standardized) Active Features ABS: Standard (Bosch Anti-lock Braking System) Traction Control: Optional (ASR - Acceleration Skid Control) Passive Features Airbags: Driver-side airbag standard from later years, passenger airbag optional/available Seat Belts: Pre-tensioning front seat belts Chassis Design: Reinforced safety cell construction 💡 Technology Features Infotainment Audio System: Factory premium sound system (e.g., Becker or Blaupunkt), often with cassette player and optional CD changer Display: Analog gauges, climate control display Driver Assistance Cruise Control: Standard Power Features: Power windows, power seats, power mirrors, power steering, power antenna Connectivity Original Connectivity: Limited to antenna control and audio input 🔧 Maintenance Service Intervals Oil Change Interval: Every 10,000 km or 1 year (refer to manual for specific recommendations) Transmission Fluid Change: Every 60,000 km or 3 years (highly recommended) Coolant Change:...