🏷️ Basic Information Identification Make: Mercedes-Benz Model: 450SEL Chassis Code: W116 Generation Generation Designation: First Generation W116 Generation Years: 1972-1980 Codes Engine Code: M117 👋 Introduction Market Position Target Audience: Mercedes-Benz W116 450SEL owners, independent repair shops, DIY enthusiasts seeking to maintain or repair their classic luxury sedan. Competitive Analysis Value Proposition: Provides significant cost savings for owners by enabling self-performed maintenance and repairs, offering access to professional-level repair data. Key Features Ease Of Use: Easy-to-follow step-by-step instructions with clear illustrations and diagrams for simplified repair processes. Delivery Method Delivery: Instant email delivery upon payment confirmation. Customer Assurance Guarantee: Customer Satisfaction Guaranteed 📋 Manual Details Coverage Areas Years Covered: 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980 Specific Models Covered: 450SEL Global Coverage: All Models/Engines/Trim/Transmissions Types Are Covered Page Count Estimated Page Count: N/A (Digital Download) Manual Type Type: Complete Workshop Service Repair Manual Language Language: English Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, tuning, fuel injection system (Bosch K-Jetronic), ignition system, cooling system, lubrication system. Transmission: Automatic transmission (e.g., 3-speed 3HP20 or 4-speed 4HP22, depending on exact year/spec), service, repair, and overhaul. Brakes: Hydraulic system, disc brake systems (front and rear), parking brake, fluid specifications, bleeding procedures. Suspension And Steering: Front and rear suspension components, shock absorbers, springs, steering box, power steering system, alignment specifications. Electrical System: Wiring diagrams, charging system (alternator, starter), lighting system, instrumentation, accessories, battery, fuses, relays. Fuel System: Fuel tank, fuel pump, fuel lines, fuel filter, fuel distributor, injectors, emissions control systems. Bodywork And Interior: Body panel repair, door mechanisms, window regulators, seat adjustments, climate control system (HVAC), sound deadening. Chassis And Frame: Frame construction, body mounting, rust prevention, underbody coatings. Procedures Included Maintenance: Scheduled maintenance tasks, oil changes, filter replacements, fluid checks and top-offs, lubrication points. Troubleshooting: Diagnostic procedures for common problems, symptom analysis, fault finding charts. Repair: Step-by-step instructions for component removal, repair, and reinstallation for all major systems. Rebuilds: Complete engine and transmission overhaul procedures with detailed component specifications and tolerances. Bodywork: Body panel alignment and repair Electrical Diagnostics: Component testing, circuit tracing, wiring harness repair. Climate Control Service: Refrigerant system service, heater core replacement, fan motor repair. Technical Depth Depth: Comprehensive, from basic maintenance to full engine and transmission rebuilds, including detailed diagnostic procedures. 📊 Manual Specifications File Format Format: PDF (Portable Document Format) Compatibility: Compatible with all PC & MAC Computers, tablets, and smartphones with Adobe Reader installed. Print Quality Printability: Printable by page, chapter, or entire manual. Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) Software Requirements Required Software: Adobe Reader (free download available) ⚙️ Engine Specifications Primary Engine Engine Type: V8, SOHC Displacement: 4.5 Liters (4520 cc) Bore X Stroke: 92.0 mm x 85.0 mm Performance Horsepower Gross Approx: 197 hp @ 4750 rpm (SAE gross for early models) Torque Gross Approx: 268 lb-ft @ 3000 rpm (SAE gross for early models) Fuel System Fuel Delivery: Bosch K-Jetronic Continuous Fuel Injection (CIS) Fuel Type: Unleaded gasoline Ignition System Ignition Type: Breakerless electronic ignition Cooling System Cooling Type: Water-cooled Lubrication System Oil Capacity With Filter: Approx. 8.0 Liters (8.5 US Quarts) 🔧 Transmission Standard Transmission Type: 3-speed Automatic (e.g., 3HP20) or 4-speed Automatic (e.g., 4HP22) depending on market and model year. Optional Optional Transmission: Manual transmission was not typically offered on the 450SEL. Features Transmission Fluid Type: Refer to manual for specific MB specifications (e.g., Dexron II compatible fluids). Gear Ratios: Detailed gear ratios provided within the manual for accurate diagnostics and repair. 📐 Dimensions Exterior Wheelbase: Approx. 3085 mm (121.5 inches) Length: Approx. 5000 mm (196.9 inches) Width: Approx. 1790 mm (70.5 inches) Height: Approx. 1420 mm (55.9 inches) Weights Curb Weight: Approx. 1800-1900 kg (3968-4189 lbs) 🛡️ Safety Features Ratings Safety Standards: Designed to meet contemporary safety standards of the 1970s and 1980s. Active Features Brakes: Four-wheel disc brakes with front ventilated discs. Steering: Recirculating ball steering with power assist. Passive Features Restraints: Seat belts (inertia reel front belts typically standard), crumple zones. Body Structure: Reinforced safety cage, energy-absorbing steering column. 💡 Technology Features Infotainment Audio System: Original equipment typically included AM/FM radio, often with an 8-track player or cassette deck. Aftermarket upgrades common. Driver Assistance Cruise Control: Optional cruise control system available on some models. Connectivity Vintage Features: Focus on analog controls, hydraulic systems, and mechanical linkages rather than modern electronic systems. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 10,000-15,000 km (6,000-9,000 miles) or annually, depending on driving conditions and oil used (refer to manual for specific recommendations). Filter Replacement: Engine oil filter, fuel filter, and air filter to be replaced at specified intervals, detailed in the manual. Fluid Specifications Engine Oil Type: Refer to manual for viscosity grades (e.g., 20W-50, 10W-40) and API service classifications. Coolant Type: Ethylene glycol based antifreeze/coolant,...