🏷️ Basic Information Identification Make: Mercedes-Benz Model: 500 SEC Model Code: C126 Product Name: Mercedes 500 SEC 1984-1985 Service Repair Manual Generation Generation Code: C126 Codes Chassis Code: C126 👋 Introduction Market Position Segment: Luxury Grand Tourer Coupe Target Audience: Owners of 1984-1985 Mercedes-Benz 500 SEC seeking comprehensive repair and maintenance information. Competitive Analysis Competitors 1984 1985: BMW 6 Series (E24), Jaguar XJ-S Key Features Vehicle Highlight: The 500 SEC represented the pinnacle of Mercedes-Benz engineering and luxury for its era, combining potent V8 power with sophisticated chassis and styling. Manual Value Proposition: This manual provides the detailed, factory-level technical data necessary to properly maintain, diagnose, and repair the complex systems of the W126 SEC, empowering owners and independent workshops. 📋 Manual Details Coverage Areas Model Years Covered: 1984, 1985 Engine Variants Covered: M117 5.0L V8 (500 SEC) Regions Covered: Global (primarily North American and European specifications for these years) Page Count Estimated Page Count: 800+ Manual Type Manual Type: Factory Service Manual / Repair Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul, diagnosis, timing, valve adjustments, lubrication system Fuel System: Bosch K-Jetronic fuel injection system, fuel pumps, injectors, pressure regulators, air flow meter Ignition System: Electronic ignition, distributor, coil, spark plugs, timing control Cooling System: Radiator, water pump, thermostat, hoses, fan clutch, coolant types Exhaust System: Catalytic converter, mufflers, exhaust manifold, oxygen sensors (if applicable for region) Transmission Automatic: 4-speed automatic (722.3), overhaul, diagnosis, fluid changes, linkage adjustment Drivetrain: Driveshaft, differential, axle shafts, CV joints Suspension Front: Independent suspension, control arms, ball joints, bushings, sway bar, shock absorbers/struts Suspension Rear: Independent suspension, semi-trailing arms, bushings, sway bar, shock absorbers, self-leveling suspension (if equipped) Steering System: Power steering, steering gearbox, pump, hoses, steering linkage Braking System: Front and rear disc brakes, ABS (Anti-lock Braking System) diagnosis and repair, brake fluid, master cylinder, calipers, pads, rotors, lines Electrical System Overview: Wiring diagrams, fuse box layout, relays, circuit protection Battery Charging: Alternator, voltage regulator, battery maintenance Lighting System: Headlights, taillights, interior lights, bulb replacement Instrument Panel: Gauges, warning lights, speedometer, tachometer, fuel gauge, temperature gauge Climate Control: Air conditioning system, heater core, blower motor, controls, refrigerant servicing Body Exterior: Body panels, doors, hood, trunk, bumpers, glass, seals, trim Body Interior: Seats, dashboard, door panels, headliner, carpeting, trim panels Convertible Top System: Hydraulic system, actuators, fabric maintenance, troubleshooting (if applicable to specific SEC model variants) Power Accessories: Power windows, power seats, central locking, cruise control, power mirrors Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection Diagnostic Procedures: Troubleshooting charts, fault code interpretation (OBD I era or specific diagnostic tests) Engine Repair: Head gasket replacement, piston ring replacement, bearing replacement, crankshaft and camshaft service Transmission Overhaul: Complete disassembly and reassembly of the 722.3 automatic transmission Brake System Repair: Caliper rebuilds, rotor replacement, ABS component service Suspension Component Replacement: Bushings, ball joints, tie rods, shocks/struts, control arms Electrical Troubleshooting: Diagnosing circuit faults, testing relays and switches, wiring harness repair Fuel Injection Diagnosis: Testing K-Jetronic components, pressure adjustments, idle mixture settings Climate Control Service: Refrigerant recovery/recharge, leak detection, blower motor and A/C compressor replacement Body Work Repair: Panel alignment, rust repair guidance, trim replacement Convertible Top Operation: Adjustment, fluid checks, seal replacement (if applicable) Technical Depth Depth Level: Comprehensive (from basic maintenance to full engine and transmission rebuilds) Diagnostic Scope: Detailed diagnostic procedures for all major systems, including specific troubleshooting trees and component testing methods. Rebuild Procedures: Step-by-step instructions for rebuilding major components like the engine and transmission, including torque specifications and assembly sequences. 📊 Manual Specifications File Format File Type: PDF Searchable Text: Yes Printable: Yes Image Quality: High-resolution illustrations and diagrams Print Quality Print Format Description: N/A (Digital PDF) Binding Type Binding Type: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Code: M117 E50 Configuration: 4.973 cc (5.0 Liters) SOHC V8 Bore X Stroke: 92.0 mm x 94.5 mm Performance Horsepower Approximate: 230 hp (170 kW) @ 4750 rpm (DIN) Torque Approximate: 287 lb-ft (390 Nm) @ 3000 rpm (DIN) Fuel System Fuel Delivery: Bosch K-Jetronic CIS (Continuous Injection System) Fuel Type: Premium Unleaded Gasoline Lubrication Oil Capacity With Filter: 8.0 Liters (8.5 US Quarts) Cooling System Coolant Capacity: 12.5 Liters (13.2 US Quarts) 🔧 Transmission Standard Type: 4-speed Automatic Transmission Model: 722.3 Features Transmission Fluid Type: Mercedes-Benz Automatic Transmission Fluid (ATF) - MB 236.2 or equivalent Transmission Fluid Capacity: Approximately 8.0 Liters (17.6 US Pints) for a complete fill (dry fill will be less). 📐 Dimensions Exterior Length: 4986 mm (196.3 in) Width: 1829 mm (72.0 in) Height: 1438 mm (56.6 in) Wheelbase: 2850 mm (112.2 in) Weights Curb Weight Approximate: 1780 kg (3925 lbs) 🛡️ Safety Features Passive Features Seat Belts: 3-point inertia-reel seat belts with...