🏷️ Basic Information Identification Make: Mercedes-Benz Model: W116 Model Variant 1: 280 S Model Variant 2: 280 SE Model Variant 3: 300 SD Model Variant 4: 450 SE Model Variant 5: 450 SEL Codes Chassis Code: W116 Engine Code 280 S Se: M110 Engine Code 300 Sd: OM617 Engine Code 450 Se Sel: M117 Generation Production Years: 1973-1980 👋 Introduction Market Position Positioning: Premium executive sedan of its era, representing Mercedes-Benz's commitment to engineering excellence and luxury Competitive Analysis Competitors: Competed with luxury sedans from BMW (E23 7 Series), Jaguar (XJ), and Cadillac (Fleetwood) Key Features Design Philosophy: Robust build quality, superior ride comfort, advanced engineering, and safety features for its time Manual Value Proposition: Provides in-depth technical knowledge identical to factory-issued manuals, enabling DIY repairs and informed maintenance. 📋 Manual Details Coverage Areas Coverage Scope: Comprehensive repair, servicing, and troubleshooting Vehicle Specific Coverage: Mercedes-Benz W116 chassis variants: 280 S, 280 SE, 300 SD, 450 SE, 450 SEL Page Count Estimated Pages: Hundreds of pages (exact count not specified, but described as extensive) Manual Type Type: Factory Service Repair Workshop Manual Language Language: English (implied by description and typical manual content) Format Format: PDF Download Licensing Usage License: Lifetime use on unlimited devices, no expiry dates, no renewal fees Platform Compatibility Compatibility: Windows and MAC computers Printability Print Options: Print single pages or entire manual 📖 Manual Coverage Systems Covered Engine: Engine mechanical, fuel system, ignition system, cooling system, exhaust system, lubrication system (specific details for M110, OM617, M117 engines) Transmission: Manual and automatic transmission overhaul, repair, and diagnostics Drivetrain: Driveshaft, differential, axles, and related components Suspension: Front and rear suspension systems, steering components, shock absorbers, springs Brakes: Brake system components, hydraulic lines, calipers, rotors, master cylinder, parking brake Electrical: Wiring diagrams, starter, alternator, battery, lighting, instrumentation, power windows, central locking Body And Chassis: Bodywork repair, rust prevention, interior trim, glass replacement, door mechanisms Climate Control: HVAC system diagnosis and repair (if applicable to model variants) Procedures Included Maintenance: Routine maintenance, oil changes, filter replacements, fluid checks and changes, tune-ups Troubleshooting: Diagnostic procedures for common and uncommon issues, fault finding guides Repair: Step-by-step repair instructions for all major components and systems Rebuilds: Complete engine and transmission rebuild procedures Component Replacement: Detailed instructions for replacing parts such as pumps, alternators, fuel injectors, etc. Adjustment: Carburetor/fuel injection adjustment, ignition timing, valve clearance (where applicable) Technical Depth Depth: Professional-level diagnostics and repair, suitable for enthusiasts and mechanics Diagrams And Illustrations: Hundreds of detailed photos and exploded diagrams for clarity Torque Specifications: Includes critical torque values for fasteners across all systems Clearances: Specifications for essential clearances (e.g., valve lash, spark plug gap) 📊 Manual Specifications File Format Format: PDF Print Quality Resolution: High-resolution, suitable for clear printing of text and diagrams Binding Type Binding: Digital download (not a physical book, so no traditional binding) Paper Type Paper Type: Digital (printable on user's choice of paper) ⚙️ Engine Specifications Primary Engine 280 Engine Type: Inline 6-cylinder, DOHC Displacement: 2.8 Liters (2789 cc) Bore X Stroke: 86.0 mm x 80.25 mm Fuel System: Bosch D-Jetronic fuel injection (SE models) or Carburetor (S models) Horsepower Approx: 185 PS (182 hp) for SE, lower for S models Torque Approx: 240 Nm (177 lb-ft) for SE Primary Engine 300 Engine Type: Inline 5-cylinder, SOHC, Diesel Displacement: 3.0 Liters (3005 cc) Fuel System: Bosch inline injection pump, indirect injection Horsepower Approx: 125 PS (123 hp) at 4350 rpm Torque Approx: 228 Nm (168 lb-ft) at 2400 rpm Primary Engine 450 Engine Type: V8, SOHC Displacement: 4.5 Liters (4520 cc) Fuel System: Bosch D-Jetronic fuel injection Horsepower Approx: 225 PS (222 hp) at 5000 rpm Torque Approx: 378 Nm (279 lb-ft) at 3000 rpm 🔧 Transmission Standard 450 Se Sel: 3-speed automatic (4G-Tronic - 722.1) Optional 280 S: 4-speed manual 280 Se: 4-speed automatic 300 Sd: 4-speed automatic Features Automatic Transmission: Hydraulic torque converter, planetary gear sets, hydraulic control unit. 📐 Dimensions Exterior Length 280 S Se 450 Se: Approx. 4960 mm (195.3 in) 450 Sel 300 Sd Longwheelbase: Approx. 5045 mm (198.6 in) Exterior Width All Models: Approx. 1800 mm (70.9 in) Exterior Height All Models: Approx. 1420 mm (55.9 in) Wheelbase Short Wheelbase: Approx. 2850 mm (112.2 in) Long Wheelbase: Approx. 2935 mm (115.6 in) Weights Curb Weight Approx: 1600-1800 kg (3527-3968 lbs), varies by model and equipment 🛡️ Safety Features Active Features Brakes: Hydraulic power-assisted disc brakes (front and rear), ABS available on later models Steering: Power-assisted recirculating ball steering Passive Features Construction: Reinforced passenger cell, crumple zones, safety steering column Seat Belts: Front and rear seat belts, some models with pre-tensioners Ratings Crash Safety: Designed to high safety standards of the era, with significant structural integrity. 💡 Technology Features Infotainment Radio: Factory-installed AM/FM radio with optional cassette player. Often upgraded by owners. Sound System: Basic speaker systems,...