🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 280S Model Generation: First Generation (W123) Model Variant: 280S (Sedan) Codes Chassis Code: W123 Engine Code: M110 (Likely, for 280S variant) 👋 Introduction Market Position Target Audience: Mercedes-Benz W123 280S owners, independent repair shops, DIY enthusiasts Competitive Analysis Value Proposition: Provides professional-grade repair and maintenance information, enabling cost savings on repairs and proper vehicle upkeep. Key Features Completeness: Complete and intact, without missing or corrupt parts/pages. Usability: Easy to use with numbered table of contents, clear instructions, and detailed visuals. Digital Advantage: Digital format offers flexibility: print sections as needed, keeps manual clean, immediate access. 📋 Manual Details Coverage Areas Vehicle Years: 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985 All Models Covered: Yes All Engines Covered: Yes (for 280S variant, but implies comprehensive W123 engine coverage within the context of the 280S) All Trim Types Covered: Yes All Transmission Types Covered: Yes Page Count Estimated Page Count: Hundreds of pages (specific count not provided, but indicative of comprehensive content) Manual Type Manual Type: Workshop Repair Service Manual Original Source: Manufacturer (Mercedes-Benz), same as used by local service/repair shops Language Language: English Format File Format: PDF Delivery Method: Instant Download 📖 Manual Coverage Systems Covered General Maintenance: Covered Troubleshooting: Covered Engine Service Repair: Covered Transmission Service Repair: Covered Brake System: Covered Wiring Diagram: Covered Electrical System: Covered Suspension: Covered Periodic Lubrication: Covered Steering: Covered Cooling System: Covered Fuel Injection Fuel System: Covered Emission System: Covered Heater Air Conditioning: Covered Engine Control System: Covered Chassis Body: Covered Restraint System: Covered Interior: Covered Differential Drive: Covered Axle: Covered Procedures Included Repair Procedures: Step-by-step, detailed substeps, numbered instructions Maintenance Procedures: Covered (Periodic Lubrication, General Maintenance) Diagnostic Procedures: Comprehensive diagnostic information, troubleshooting combined with electrical service Disassembly Assembly: Included Cleaning Reinstallation: Included Technical Depth Technical Depth: Professional, high detail, complete information, used by professional technicians Illustrations Illustrations Quality: Detailed illustrations, drawings, and photos; enlarged inset for detailed parts examination Electrical Systems Electrical Diagnostic And Repair: Easy diagnosis and repair with detailed wiring diagrams 📊 Manual Specifications File Format File Type: PDF Print Quality Printability: Full Printable Zoom Capability: Zoom IN/OUT capability Binding Type Binding Type: Digital Download (No physical binding) Paper Type Paper Type: Not Applicable (Digital Format) Software Requirements PDF Reader: Adobe PDF Reader Unzip Utility: WinZip Compatibility Operating Systems: All Versions of Windows & Mac ⚙️ Engine Specifications Primary Engine Engine Type: Inline-6 Cylinder (Presumed for 280S) Engine Displacement: 2.8 Liters (2789cc) Engine Code Designation: M110 (Likely, gasoline engine) Fuel System Fuel Delivery: Fuel Injection (Bosch K-Jetronic is common for this era and model) Performance Horsepower: Approx. 140-160 hp (depending on specific market and emission controls) Torque: Approx. 160-175 lb-ft (depending on specific market and emission controls) 🔧 Transmission Standard Standard Transmission: 4-Speed Manual Transmission (common) Optional Optional Transmission: 4-Speed Automatic Transmission (also common) Features Transmission Coverage: Service and repair for both manual and automatic transmissions covered. 📐 Dimensions Exterior Body Styles: Sedan (W123.033 for 280S) Weights Curb Weight: Approx. 1500-1650 kg (3300-3630 lbs) depending on options 🛡️ Safety Features Passive Features Safety Cage: Reinforced passenger safety cell Impact ABSorption: Designed crumple zones Restraints: Seat belts (manual references restraint system coverage) 💡 Technology Features Infotainment Infotainment Features: Basic radio (AM/FM, possibly cassette), analog climate control. Driver Assistance Driver Assistance Features: Power steering, anti-lock braking system (ABS) became available on later models or as an option. Connectivity Connectivity Features: Not applicable for the era. 🔧 Maintenance Service Intervals General Maintenance Intervals: Covered in manual (specific intervals not listed, but expected to include oil changes, filter replacements, fluid checks) Fluid Specifications Engine Oil: Specification provided in manual (likely SAE 20W-50 or similar, depending on climate and engine condition) Coolant: Specification provided in manual (likely a 50/50 mix of antifreeze and distilled water) Brake Fluid: Specification provided in manual (likely DOT 3 or DOT 4) Transmission Fluid Auto: Specification provided in manual (likely a Dexron-III equivalent or MB specific fluid) Transmission Fluid Manual: Specification provided in manual (likely a GL-4 or GL-5 gear oil) Known Issues Common W123 Issues: Rust (especially around wheel arches, sills, and windows), vacuum leak issues (door locks, climate control), aging rubber components (hoses, mounts), fuel distributor issues (K-Jetronic). 📚 Vehicle History Brand Heritage Manufacturer Reputation: Mercedes-Benz known for engineering, durability, and luxury. Model Evolution W123 Series Introduction: Introduced in 1975 as a successor to the W114/W115 series. W123 Series Reputation: Renowned for its robust build quality, reliability, and comfort, often considered one of Mercedes-Benz's most durable models. Production Production Period: 1975-1985 (W123 platform) 280S Production Years: 1976-1985 (as covered by the manual)