🏷️ Basic Information Identification Make: Mercedes-Benz Model: 450 SEL Chassis Code: W116 Production Years: 1973-1980 Generation Generation Code: First Generation W116 👋 Introduction Market Position Target Audience: Mercedes-Benz W116 450 SEL owners and independent repair shops seeking comprehensive technical information. Competitive Analysis Value Proposition: Provides factory-level repair data, enabling significant cost savings on maintenance and repairs compared to dealership services. Key Features Authenticity: Original Mercedes-Benz workshop manual used by local service/repair shops. Completeness: Complete and intact, with no missing or corrupt parts/pages. User Friendliness: Easy-to-follow directions, numbered instructions, and bold figure numbers for quick reference. Digital Advantage: Convenience of digital format for easy searching, printing specific sections, and staying clean. 📋 Manual Details Coverage Areas Covered Years: 1973, 1974, 1976, 1977, 1978, 1979, 1980 Covered Models: All W116 450 SEL models Covered Engines: All engine variants for the 450 SEL Covered Transmissions: All transmission types for the 450 SEL Covered Trims: All trim levels for the 450 SEL Page Count Estimated Page Count: Hundreds of pages (typical for a comprehensive workshop manual) Manual Type Type: Workshop Repair Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Service And Repair: Detailed procedures for engine overhaul, component replacement, tuning, and diagnostics. Transmission Service And Repair: Comprehensive coverage of automatic transmission removal, installation, repair, and adjustment. Brake System: Maintenance, repair, and diagnostics for hydraulic and pneumatic brake systems, including ABS if applicable to late models. Electrical System: Detailed diagnostics and repair procedures for all electrical components, including wiring diagrams. Suspension: Service and repair of front and rear suspension systems, including shock absorbers, springs, and control arms. Steering: Maintenance and repair of the power steering system, steering column, and steering linkages. Cooling System: Radiator, fan, water pump, and thermostat service, including flush and refill procedures. Fuel Injection Fuel System: Detailed information on the Bosch K-Jetronic fuel injection system, including fuel pump, injectors, and pressure regulators. Emission System: Information on emission control components and troubleshooting. Heater Air Conditioning: Service and repair of HVAC systems, including refrigerant handling and component replacement. Engine Control System: Diagnostics and repair of the engine management unit and associated sensors. Chassis Body: Body repair, panel replacement, and chassis maintenance. Restraint System: Information on seatbelts and associated components. Interior: Trim removal and installation, upholstery, and interior component service. Differential Drive Axle: Service and maintenance of the rear axle and differential. Procedures Included General Maintenance: Routine checks, fluid changes, filter replacements, and lubrication. Troubleshooting: Systematic diagnosis of common and uncommon problems with step-by-step guides. Periodic Lubrication: Detailed lubrication points and schedules. Disassembly Assembly: Step-by-step instructions for removing and reassembling vehicle components. Cleaning Reinstalling: Procedures for cleaning parts before reassembly and proper installation techniques. Technical Depth Depth Of Coverage: Complete professional-level repair and maintenance information, identical to factory service manuals. Diagnostic Capabilities: Advanced diagnostic procedures for all major vehicle systems. Illustrations Diagrams: Hundreds of detailed illustrations, drawings, photos, and wiring diagrams. 📊 Manual Specifications File Format Format: PDF Accessibility Features: Zoom IN/OUT functionality Print Quality Printability: Full Printable Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) Delivery Delivery Method: Instant Download Requirements Software Requirements: Adobe PDF Reader, WinZip Compatibility: All Versions of Windows & Mac ⚙️ Engine Specifications Primary Engine Engine Type: V8 SOHC (M117) Displacement: 4.5 Liters (4520 cc) Performance Horsepower Approx: 230 hp @ 5000 rpm (varies by market and year) Torque Approx: 380 Nm (280 lb-ft) @ 3000 rpm (varies by market and year) Fuel System Fuel Delivery: Bosch K-Jetronic (CIS) Fuel Injection Recommended Fuel: Unleaded Gasoline (Octane rating varies by market, consult manual for specifics) Cooling System Coolant Capacity: Approximately 12.5 Liters (13.2 US Quarts) 🔧 Transmission Standard Type: 3-speed Automatic (3HP22) Optional Type: 4-speed Automatic (e.g., 4G-Tronic, introduced later in the W116 production run for some models) Features Fluid Type: Dexron-III (or equivalent ATF, consult manual for exact specification) 📐 Dimensions Exterior Length: Approx. 5085 mm (199.8 in) Width: Approx. 1830 mm (72.0 in) Height: Approx. 1430 mm (56.3 in) Weights Curb Weight Approx: Approx. 1800 kg (3968 lbs) 🛡️ Safety Features Ratings Safety Standards: Designed to meet 1970s automotive safety standards. Active Features Brakes: Four-wheel disc brakes (ventilated front) Passive Features Structure: Reinforced body structure, crumple zones. Restraints: Three-point seat belts (front and rear). 💡 Technology Features Infotainment Audio System: Factory AM/FM radio with cassette player (or optional multi-speaker systems). Driver Assistance Cruise Control: Standard on many models. Climate Control: Automatic climate control system with vacuum-actuated actuators. Connectivity Connectivity Features: Limited to period-appropriate features; no modern digital connectivity. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 10,000-15,000 km (6,000-9,000 miles) or 12 months, refer to specific manual for exact intervals. Transmission Fluid Change: Recommended at 40,000-80,000 km (25,000-50,000 miles), depending on driving conditions. Fluid Specifications Engine Oil Specification: Refer to manual for specific API service classification...