🏷️ Basic Information Identification Make: Mercedes-Benz Model: W116 300 SD Model Code: W116 Engine Code Designation: OM617 Generation Generation Name: First Generation S-Class Codes Vin Prefix: 116 👋 Introduction Market Position Target Audience: Mercedes-Benz W116 300 SD owners, independent repair shops, automotive enthusiasts Competitive Analysis Advantage: Provides the same information as professional service shops, enabling DIY repairs and significant cost savings. Key Features Completeness: Complete and intact, without missing or corrupt parts/pages. Usability: Easy to use with numbered instructions, clear diagrams, and a logical table of contents. 📋 Manual Details Coverage Areas Applicable Years: 1978, 1979, 1980 Covered Models: All W116 300 SD variants Covered Engines: 3.0L OM617 Diesel (all variants within the model years) Covered Transmissions: Automatic Transmissions (as equipped) Covered Trims: All Trim Levels Page Count Estimated Page Count: Hundreds of pages (exact count not specified, but described as comprehensive) Manual Type Type: Workshop Repair Service Manual Source: Original Manufacturer (Mercedes-Benz) Language Language: English Format File Format: PDF Delivery Method: Instant Download Printability: Full Printable Zoom Functionality: Yes (Zoom IN/OUT) Requirements Software Requirements: Adobe PDF Reader, WinZip Compatibility: All Versions of Windows & Mac 📖 Manual Coverage Systems Covered Engine Service Repair: Yes Transmission Service Repair: Yes Brake System: Yes Wiring Diagrams: Yes (detailed) Electrical System: Yes (diagnostics and repair) Suspension: Yes Steering: Yes Cooling System: Yes Fuel Injection Fuel System: Yes Emission System: Yes Heater Air Conditional: Yes Engine Control System: Yes Chassis Body: Yes Restraint System: Yes Interior: Yes Differential Drive: Yes Axle: Yes Procedures Included General Maintenance: Yes Troubleshooting: Yes (comprehensive) Periodic Lubrication: Yes Repair Procedures: Yes (step-by-step, detailed substeps) Disassembly Assembly: Yes Cleaning Reinstalling: Yes Technical Depth Depth: Professional Technician Level Diagnostic Information: Comprehensive diagnostic information Illustrations: Detailed illustrations, drawings, and photos Instructions Format: Numbered instructions, bold figure numbers for illustration matching Critical Information Highlight: Notes, cautions, and warnings throughout each chapter 📊 Manual Specifications File Format Format: PDF Print Quality Quality: High Quality Binding Type Type: Digital Download (printable) Paper Type Type: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 5-cylinder Diesel Displacement: 2998 cc (3.0 Liters) Bore X Stroke: 87.0 mm x 84.0 mm Compression Ratio: 21.0:1 Fuel Delivery: Bosch Inline Fuel Injection Pump Performance Horsepower Approx: 115 hp @ 4200 rpm (varies slightly by specific year/market) Torque Approx: 228 Nm (168 lb-ft) @ 2400 rpm (varies slightly by specific year/market) 🔧 Transmission Standard Type: 4-speed Automatic Transmission Optional Type: N/A (Automatic was standard for 300 SD) Features Torque Converter: Yes 📐 Dimensions Exterior Length: 4995 mm (196.7 in) Width: 1850 mm (72.8 in) Height: 1480 mm (58.3 in) Weights Curb Weight Approx: 1790 kg (3946 lbs) 🛡️ Safety Features Ratings Crash Testing Era: Pre-modern safety rating systems; focused on passive safety design for its era. Active Features ABS: Optional on some models, standard on later W116s but potentially optional on early 300 SD variants. Manual covers its diagnosis if equipped. Passive Features Body Structure: Reinforced safety cage, crumple zones Airbags: Not standard equipment for this period. Seatbelts: Standard (3-point front, 2-point rear expected, manual details installation/adjustment/repair) 💡 Technology Features Infotainment Radio: Typically AM/FM radio, possibly with cassette player depending on options. Manual would cover repair and alignment. Driver Assistance Cruise Control: Available as an option, manual covers its operation and repair. Connectivity Type: N/A by modern standards; primarily mechanical and analog systems. 🔧 Maintenance Service Intervals Oil Change Interval: Typically 5,000-7,500 miles or 6-12 months (refer to manual for specific diesel recommendations). Fuel Filter Replacement: Recommended at regular intervals, especially for diesel to prevent injection system issues. Air Filter Replacement: Based on driving conditions, typically annually or every 15,000 miles. Fluid Specifications Engine Oil Type: API CD or CE rated diesel engine oil, viscosity typically 15W-40 or 10W-40 (refer to manual for exact specification). Transmission Fluid Type: Dexron III (or equivalent for the era) Automatic Transmission Fluid (ATF). Coolant Type: Ethylene Glycol based antifreeze with corrosion inhibitors. Known Issues Diesel Specific: Glow plug system reliability, vacuum shut-off system, potential for injector pump wear, oil cooler seals. General W116: Hydropneumatic suspension issues (if equipped with self-leveling suspension), climate control system complexity, electrical component degradation over time, rust in common areas. 📚 Vehicle History Brand Heritage Mercedes Benz Legacy: Renowned for engineering excellence, luxury, and durability. Model Evolution W116 Significance: The first generation to be officially designated the 'S-Class' (Sonderklasse), setting the benchmark for luxury sedans. Production Production Years: 1972-1980 300 Sd Introduction: Introduced in 1978, featuring the powerful and efficient OM617 turbocharged diesel engine.