🏷️ Basic Information Identification Make: Mercedes-Benz Model: W116 Model Variants: 280 S, 280 SE, 300 SD, 450 SE, 450 SEL Generation Generation Code: W116 Codes Chassis Code: W116 👋 Introduction Market Position Target Audience: Mercedes-Benz W116 owners, DIY mechanics, professional repair shops. Competitive Analysis Value Proposition: Provides professional-level diagnostic, repair, and maintenance information, enabling significant cost savings on repairs. Key Features Accuracy Completeness: Original manufacturer's manual, guaranteed complete and intact, same as used by local service/repair shops. Usability: Detailed illustrations, drawings, photos, enlarged insets, numbered table of contents, and easy-to-follow directions. Format Advantage: Digital PDF format offers convenience, printability of specific sections, and avoids damage to the manual. 📋 Manual Details Coverage Areas Covered Years: 1973, 1974, 1976, 1977, 1978, 1979, 1980 Page Count Estimated Page Count: Hundreds of pages (specific count not provided but implied extensive) Manual Type Type: Workshop Repair Service Manual (WSM) Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine Service/Repair, Transmission Service/Repair, Fuel Injection/Fuel System, Engine Control System, Cooling System, Emission System, Differential/Drive, Axle Chassis And Suspension: Brake System, Suspension, Steering, Chassis/Body Electrical And Electronics: Wiring Diagram, Electrical System Comfort And Interior: Heater/Air Conditioner, Interior, Restraint System General And Miscellaneous General Maintenance: General Maintenance, Periodic Lubrication Procedures Included Diagnostic And Repair: Troubleshooting, Detailed substeps for repair procedures, Notes, cautions, and warnings, Numbered instructions, Disassembly, Assembly, Cleaning, Reinstalling procedures Maintenance: Routine maintenance tasks, Periodic lubrication Electrical Diagnostics: Troubleshooting and electrical service procedures combined with detailed wiring diagrams Technical Depth Depth: Comprehensive diagnostic, repair, and maintenance information used by professional technicians. Scope: Covers All Models, Engines, Trim, and Transmission Types within the specified years. 📊 Manual Specifications File Format Format: PDF Requirements: Adobe PDF Reader, WinZip Print Quality Printability: Full Printable File Features Zoom Functionality: YES (Zoom IN/OUT) Compatibility Operating Systems: All Versions of Windows & Mac Delivery Method: Instant Download ⚙️ Engine Specifications Primary Engine 280 S/Se: 2.8L Inline-6 (M110 engine) 300 Sd: 3.0L Inline-5 Diesel (OM617 engine) 450 Se/Sel: 4.5L V8 (M117 engine) Performance 280 S/Se (Approximate): 160-185 hp, 155-170 lb-ft torque 300 Sd (Approximate): 110-125 hp, 170-190 lb-ft torque 450 Se/Sel (Approximate): 180-225 hp, 245-275 lb-ft torque Fuel System 280 S/Se: Bosch D-Jetronic or K-Jetronic Fuel Injection 300 Sd: Bosch Inline Fuel Injection Pump (Diesel) 450 Se/Sel: Bosch D-Jetronic or K-Jetronic Fuel Injection 🔧 Transmission Standard All Models: 4-speed Automatic Transmission (e.g., 4G-Tronic) Optional 280 S/Se: 4-speed or 5-speed Manual Transmission (less common for North American market) Features Automatic: Torque converter automatic with hydraulic control. 📐 Dimensions Exterior Sedan Length: Approx. 4.9m (193 in) Coupe Length: Approx. 4.9m (193 in) Wheelbase: Approx. 2.9m (114 in) Weights Curb Weight: Approx. 1600-1800 kg (3500-4000 lbs) depending on model and engine 🛡️ Safety Features Ratings Historical Context: Designed with advanced safety features for its era, including crumple zones and robust chassis construction. Specific crash test ratings from modern agencies may not be directly applicable but it was a benchmark in safety for its time. Active Features Braking: Power-assisted disc brakes on all four wheels (standard on most models), Anti-lock Braking System (ABS) became available on later models. Passive Features Construction: Reinforced passenger cell, energy-absorbing steering column, impact-absorbing interior materials. Restraint: Seat belts (lap and shoulder belts standard in front, lap belts in rear). 💡 Technology Features Infotainment Audio System: Typically an AM/FM radio with cassette player, often from Blaupunkt or Becker. Analog tuning. Driver Assistance ABS: Anti-lock Braking System (ABS) available on later models (often optional). Connectivity Early Era: No modern connectivity features like Bluetooth or USB. Focus was on mechanical and electrical reliability. 🔧 Maintenance Service Intervals Oil Change: Typically every 5,000-7,500 miles or annually, check specific model/engine recommendations. Tune Up: Spark plug replacement, filter changes as per manual recommendations, generally around 15,000-30,000 miles. Fluid Specifications Engine Oil: API SG or SH, SAE 10W-40 or 20W-50 (check manual for precise viscosity based on climate). Coolant: Ethylene glycol-based coolant (e.g., Mercedes-Benz approved G05 or equivalent), 50/50 mix with distilled water. Transmission Fluid Automatic: Dexron II or III compatible fluid (e.g., MB 236.1). Brake Fluid: DOT 3 or DOT 4. Known Issues General: Fuel injector issues (especially in early D-Jetronic models), climate control system malfunctions, vacuum hose degradation, rust on body panels, suspension component wear. Diesel Specific: Glow plug issues, injector pump wear, potential turbocharger issues (if equipped on later versions of OM617). Filter Part Numbers Oil Filter: Bosch 3300, Mahle OC 29, Mann W930/4 (Examples, confirm for specific engine). 📚 Vehicle History Brand Heritage Mercedes Benz Legacy: Mercedes-Benz has a long-standing reputation for engineering excellence, luxury, and safety, established over decades of automotive innovation. Model Evolution W116 Introduction: Introduced in 1972 as the successor to the W108/W109, the W116 was Mercedes-Benz's flagship sedan, setting new standards in automotive engineering, safety, and comfort. It was the first Mercedes-Benz to officially be called an...