🏷️ Basic Information Identification Make: Mercedes-Benz Model: 450 SE Chassis Code: W116 Applicable Years: 1973, 1974, 1975, 1976 👋 Introduction Market Position Target Audience: Professional automotive technicians and experienced DIY owners of Mercedes-Benz W116 450 SE models. Competitive Analysis Value Proposition: Provides factory-level repair and maintenance information to ensure quality service and proper vehicle upkeep, saving on dealership costs. Key Features Emphasis On Safety: Highlights safety precautions and the importance of using tools like torque wrenches for critical procedures. Proprietary Component Instructions: Includes instructions for proprietary components, aiding in understanding their function and performance. 📋 Manual Details Coverage Areas Systems Covered: Engine, Fuel System, Ignition System, Lubrication System, Exhaust System, Electrical System, Body, Transmission (including removal/installation), Suspension, Steering, Brakes, Climate Control, Interior Trim, Bodywork Repair, Diagnostics and Troubleshooting Page Count Estimated Page Count: Comprehensive (exact count not specified, but described as a complete service manual) Manual Type Type: Workshop Service Manual / Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanics: Detailed repair and overhaul procedures for the M117 V8 engine. Fuel System Diagnostics: Procedures for fuel injection system (Bosch K-Jetronic), fuel pumps, lines, and filters. Ignition System Service: Ignition timing, spark plugs, distributor, coil, and related components. Lubrication System Maintenance: Oil filter replacement, oil change procedures, oil pressure testing, and pump maintenance. Exhaust System Repair: Catalytic converter (if applicable), muffler, exhaust manifold, and pipe repair. Electrical System Troubleshooting: Wiring diagrams, component testing, battery, alternator, starter, lighting, and auxiliary systems. Bodywork And Trim: Interior and exterior trim removal/installation, body panel repair, and adjustments. Procedures Included Routine Maintenance: Tune-ups, fluid changes, filter replacements, lubrication, and general servicing. Disassembly And Reassembly: Detailed step-by-step instructions for component and system disassembly and reassembly. Diagnostic Procedures: Troubleshooting guides and diagnostic steps for common and uncommon problems. Component Replacement: Instructions for replacing wear items and major components. Special Tool Identification: References to required or recommended Mercedes-Benz special tools with part numbers. Technical Depth Depth Of Information: Covers everything from routine maintenance to complete engine and transmission overhauls, suitable for professional technicians and knowledgeable DIY enthusiasts. 📊 Manual Specifications File Format File Type: PDF Print Quality Printability: Yes, printable Binding Type Binding: Digital (Not Applicable) Paper Type Paper Quality: Digital (Not Applicable) ⚙️ Engine Specifications Primary Engine Engine Code: M117 Engine Type: V8, SOHC Performance Displacement: 4.5 Liters (4520 cc) Bore X Stroke: 92.0 mm x 85.0 mm (approx.) Compression Ratio: 8.0:1 to 9.0:1 (depending on market and year) Horsepower Output: Approx. 220-230 bhp @ 5000 rpm (SAE Gross, varies by market) Torque Output: Approx. 270-280 lb-ft @ 3000 rpm (SAE Gross, varies by market) Fuel System Fuel Delivery: Bosch K-Jetronic (CIS) Continuous Injection System Fuel Type: Premium Unleaded Gasoline Lubrication System Oil Capacity: Approx. 8.0 Liters (with filter change) Recommended Oil Viscosity: 10W-40 or 10W-50 (refer to manual for specific climate recommendations) 🔧 Transmission Standard Type: 3-speed Automatic (BorgWarner DG-300 or Mercedes-Benz 4G-Tronic variant) Optional Type: 4-speed Manual (less common, primarily for earlier models or specific markets) Features Automatic Transmission Control: Hydraulic control, often with modes for economy/sport. Fluid Specifications Automatic Transmission Fluid: MB Dexron II (or equivalent specification, refer to manual for exact MB part number) Fluid Capacity Automatic Transmission Fluid Capacity: Approx. 2.0-2.5 Liters (for torque converter and cooler, pan drop refill is less) 📐 Dimensions Exterior Length: Approx. 5000 mm (196.9 in) Width: Approx. 1800 mm (70.9 in) Height: Approx. 1450 mm (57.1 in) Weights Curb Weight: Approx. 1700-1800 kg (3750-3970 lbs) Gross Vehicle Weight Rating: Approx. 2200 kg (4850 lbs) 🛡️ Safety Features Ratings Crash Safety Era: Designed to meet safety standards of the 1970s, with significant advancements in passive safety for its time. Active Features Braking System: Hydraulic disc brakes on all four wheels, often with power assistance and dual-circuit systems. Suspension Stability: Independent front suspension (double wishbone) and semi-trailing arm rear suspension for stable handling. Passive Features Body Structure: Reinforced passenger cell and crumple zones designed for occupant protection. Interior Safety: Collapsible steering column, padded dashboard, and safety glass. 💡 Technology Features Infotainment Audio System: Original fitment typically featured an AM/FM radio, often with a single cassette player. Aftermarket upgrades are common. Driver Assistance Cruise Control: Optional or standard depending on trim and market, a significant technological feature for its era. Connectivity Vintage Tech: Focus on mechanical and electrical systems rather than modern digital connectivity; manual covers era-appropriate diagnostics and repairs. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000-10,000 km (3,000-6,000 miles) or annually, depending on usage and oil type. Tune Up Interval: Spark plugs and ignition points (if applicable) checked/replaced every 15,000-20,000 km (9,000-12,000 miles). Major Service: Comprehensive check and fluid changes typically every 30,000-50,000 km (18,000-30,000 miles). Fluid Specifications Coolant Type: Ethylene Glycol based antifreeze/coolant (Mercedes-Benz specification, typically blue or green). Brake Fluid Type: DOT 3 or DOT 4...