🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 280E Year: 1985 Codes Chassis Code: W123 Engine Code: M110.987 👋 Introduction Market Position Target Audience: Do-it-yourself enthusiasts and experienced professional mechanics Value Proposition: Comprehensive, cost-effective alternative to overpriced physical manuals and dealership service. Competitive Analysis Advantage: Official factory data provides accuracy and completeness unmatched by generic aftermarket guides. Key Features Illustrations: Hundreds of detailed illustrations, drawings, and photos Navigation: Numbered table of contents for quick information retrieval Visual Aids: Enlarged insets for detailed part examination 📋 Manual Details Coverage Areas Region: Global (Factory Standards) Specific Models Covered: Mercedes-Benz W123 280E (1985 model year) Page Count Estimated Pages: Hundreds (precise count not specified but implied to be extensive) Manual Type Type: Workshop Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Mechanical Systems: Engine, Transmission, Drivetrain, Suspension, Steering, Brakes, Cooling, Fuel, Exhaust Electrical Systems: Ignition, Starting, Charging, Lighting, Instrumentation, Power Accessories, Wiring Diagrams Bodywork: Body and Chassis, Interior Trim, Exterior Components, Glass, Seals Procedures Included Maintenance: Scheduled Maintenance, Fluid Changes, Filter Replacements, Inspections Repair And Rebuild: Engine Overhaul, Transmission Rebuilding, Component Replacement, System Repairs Troubleshooting: Diagnostic Procedures, Fault Finding, Common Issues and Solutions Technical Depth Depth: Complete Factory Level Detail, From Basic Maintenance to Full Rebuilds Documentation Style: Step-by-step instructions, detailed substeps, notes, cautions, warnings 📊 Manual Specifications File Format Digital Format: PDF Print Quality Printability: Fully Printable (individual pages or entire manual) Binding Type Physical Binding Equivalent: Digital Download (printable for user-created binding) Paper Type Physical Paper Equivalent: User-printable on standard paper ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-Cylinder, Naturally Aspirated Displacement: 2.8 Liters (2799 cc) Engine Code: M110.987 Performance Horsepower Approx: 185 hp @ 5800 rpm (approximate for European spec, US spec may vary) Torque Approx: 240 Nm @ 3500 rpm (approximate for European spec) Fuel System Fuel Delivery: Bosch K-Jetronic Mechanical Fuel Injection Fuel Type: Unleaded Gasoline (Premium Octane Recommended) 🔧 Transmission Standard Transmission Type Standard: 4-speed Manual Transmission (likely standard in many markets for 280E) Optional Transmission Type Optional: 4-speed Automatic Transmission (optional, often referred to as '722.1' or '722.3' series) Features Fluid Type: ATF Dexron III (for automatic) / Gear Oil GL-4 (for manual, specific viscosity to be confirmed in manual) 📐 Dimensions Exterior Body Style: 4-door Sedan (Saloon) Wheelbase: 2810 mm (110.6 inches) Weights Curb Weight Approx: 1470 kg (3240 lbs) - varies by option and market 🛡️ Safety Features Ratings Crash Safety Era: Designed to late 1970s/early 1980s safety standards, with significant improvements over predecessors. Active Features Braking System: Front Disc Brakes, Rear Disc Brakes (typically ventilated front discs), Vacuum Servo Assist Passive Features Chassis Construction: Monocoque construction with integrated crumple zones Seatbelts: Standard front seatbelts, often with inertia reels; rear seatbelts 💡 Technology Features Infotainment Audio System: Factory original radio/cassette player (e.g., Becker models), optional features like power antenna. Driver Assistance Climate Control: Optional Air Conditioning (often belt-driven compressor), manual ventilation systems. Cruise Control: Optional Cruise Control System (likely vacuum or electronically controlled). Connectivity Connectivity Features: Limited by era; primarily focused on core vehicle functions. 🔧 Maintenance Service Intervals Oil Change Interval Approx: Every 10,000 - 15,000 km or 6-12 months (depending on driving conditions and oil used). Major Service Interval Approx: Every 30,000 - 50,000 km (includes inspections of critical components, spark plugs, belts, etc.). Fluid Specifications Engine Oil Type: API SG or higher, SAE 10W-40 or 15W-40 recommended (specific Mercedes-Benz approval to be confirmed in manual, e.g., MB 227.1, 228.1) Coolant Type: Mercedes-Benz approved coolant concentrate (e.g., G05 or similar ethylene glycol based) mixed with distilled water (50/50 ratio). Brake Fluid Type: DOT 3 or DOT 4 Known Issues Common Wear Items: Vacuum system leaks (affecting central locking, climate control, engine idle), differential seals, transmission mounts, flex discs, ball joints, rust in common areas (wheel arches, sills, jacking points). Engine Specifics: M110 engine: Potential for valve guide wear, timing chain stretch over high mileage. K-Jetronic system can be sensitive to fuel quality and requires meticulous maintenance. 📚 Vehicle History Brand Heritage Manufacturer Reputation: Mercedes-Benz: Known for engineering excellence, durability, luxury, and safety innovations. Model Evolution W123 Generation: Second generation of the mid-size Mercedes-Benz model range (1976-1985). Known for its exceptional build quality and longevity. 280E Positioning: Positioned as a powerful, refined, and comfortable engine option within the W123 lineup, bridging the gap between the four-cylinder models and the V8 variants. Production Production Period W123: 1976 – 1985 Manufacturing Locations: Primarily Germany (Sindelfingen, Bremen, Untertürkheim), with global assembly plants. 🏆 Awards & Recognition Recognitions General Reputation: The W123 chassis is widely acclaimed for its legendary durability and reliability, often cited as one of the most over-engineered Mercedes-Benz models. Industry Standing: Considered a benchmark for build quality and longevity in its segment during its production run.