🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 280E Model Series: W123 Engine Code: M110 (inline-six, fuel-injected) Generation Production Years: 1976-1985 👋 Introduction Market Position Target Audience: Owners of Mercedes-Benz W123 280E, DIY enthusiasts, and professional mechanics. Competitive Analysis Value Proposition: Provides comprehensive, factory-level repair information at a fraction of the cost of dealer services, empowering owners to maintain and repair their classic Mercedes-Benz. Key Features Illustrations: Detailed illustrations, diagrams, and photographs to guide repairs. Wiring Schematics: Included wiring diagrams for electrical system diagnosis and repair. Instructions: Step-by-step instructions for all procedures. Content Organization: Numbered table of contents for easy navigation and quick access to information. 📋 Manual Details Coverage Areas Primary Coverage: Mercedes-Benz W123 280E Model Years Covered: 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985 Page Count Estimated Page Count: Extensive (Specific count not provided, but described as 'complete' and 'detailed') Manual Type Type: Workshop Service Repair Manual (Factory Equivalent) Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul, repair, and maintenance of the M110 inline-six engine. Engine Electrical: Detailed diagnosis and repair of all engine electrical components, including ignition, fuel injection, and sensors. Emission Control: Information on emission control systems, including diagnosis and adjustment. Fuel System: Diagnosis and repair of fuel injection system (Bosch K-Jetronic), fuel pump, lines, and filters. Suspension: Front and rear suspension components, alignment, shock absorbers, springs, and control arms. Clutch: Service and replacement of clutch assembly and related components. Manual Transmission: Repair and maintenance of the manual gearbox (if applicable to 280E variants). Automatic Transmission: Service and repair of the automatic transmission, including fluid changes and common issues. Driveshaft Axle: Inspection and repair of driveshaft, universal joints, and rear axle components. Steering: Diagnosis and repair of power steering system, steering gearbox, and linkages. Brakes: Front and rear brake systems, including discs, pads, calipers, lines, master cylinder, and ABS (if equipped). Body Interior Exterior: Repair and maintenance of body panels, trim, doors, windows, and interior components. Body Electrical: Wiring diagrams, diagnosis, and repair of headlights, taillights, interior lighting, power windows, locks, and HVAC electrical systems. Restraint: Information on seat belts and any associated safety systems. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, tune-ups, and fluid checks. Troubleshooting: Diagnostic procedures for common and uncommon faults across all systems. Repair: Step-by-step repair instructions for virtually all components and systems. Rebuilds: Detailed procedures for engine, transmission, and major component rebuilds. Diagnostics: Comprehensive diagnostic routines and troubleshooting trees. Technical Depth Depth: Comprehensive, covering everything from basic maintenance to complete engine and transmission overhauls. Includes detailed specifications and procedures for experienced mechanics and do-it-yourselfers. 📊 Manual Specifications File Format Format: PDF Searchable: Likely searchable due to PDF format, enabling quick information retrieval. Print Quality Printability: Fully printable, allowing users to print specific pages or entire sections for workshop use. Zoom Functionality: YES (allows for detailed viewing of illustrations and diagrams). Binding Type Binding: N/A (Digital PDF format) Paper Type Paper Quality: N/A (Digital PDF format) ⚙️ Engine Specifications Primary Engine Engine Type: M110, 2.8L (2799 cc) DOHC inline-six Fuel Delivery: Bosch K-Jetronic mechanical fuel injection Performance Horsepower: Approximately 185 PS (136 kW) at 5800 rpm (DIN rating for early models) Torque: Approximately 240 Nm (177 lb-ft) at 4000 rpm (DIN rating for early models) Fuel System Fuel Type: Unleaded gasoline (premium recommended) 🔧 Transmission Standard Type: Typically a 4-speed manual transmission was standard on many W123 models, but the 280E often featured automatic. Optional Type: Optional 4-speed automatic transmission (historically common on 280E). Features Fluid Type Automatic: Mercedes-Benz Automatic Transmission Fluid (ATF) - specific part number or specification like Dexron II/III equivalent is detailed in the manual. 📐 Dimensions Exterior Body Styles: Saloon (Sedan), Estate (Wagon), Coupé, Long-wheelbase Saloon. Weights Curb Weight Approx: 1500 - 1600 kg (3300 - 3520 lbs), depending on body style and equipment. 🛡️ Safety Features Ratings Historical Safety: While formal crash test ratings as we know them today were less prevalent, the W123 was renowned for its robust 'safety cell' construction and advanced safety features for its era, including crumple zones. Active Features Braking System: Four-wheel disc brakes (front ventilated), Anti-lock Braking System (ABS) became available on later models or as an option. Passive Features Occupant Protection: Reinforced passenger compartment, energy-absorbing steering column, padded dashboard, three-point seat belts (front, rear often lap belts initially). 💡 Technology Features Infotainment Original Features: Analog radio with optional cassette player, speaker systems. Driver Assistance Early ABS: Antilock Braking System (ABS) was an optional feature, representing advanced technology for its time. Connectivity Original Systems: Limited to basic automotive systems; no modern connectivity features. 🔧 Maintenance Service Intervals Oil Change: Typically every 7,500 to 10,000 miles (12,000 to 16,000 km), or annually, whichever comes first (refer to manual for exact specification based on oil used). Major Service: Key checkpoints at...