🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 280SE Generation Generation Code: W123 Codes Model Code Specific: 280SE 👋 Introduction Market Position Historical Segment: Executive Sedan / Luxury Mid-size Car Competitive Analysis Key Competitors: BMW 5 Series (E12/E28), Audi 100, Volvo 240/260 Series, Jaguar XJ Key Features Vehicle Characteristics: Renowned for its robust build quality, legendary durability, comfortable ride, and sophisticated engineering Manual Value Proposition: Provides comprehensive technical data, instructions, and methodology for repair interventions, enabling both professional mechanics and DIY enthusiasts to maintain and repair the W123 280SE effectively. 📋 Manual Details Coverage Areas Coverage Years: 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985 Page Count Page Count: 559 Manual Type Manual Type: Workshop Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine Systems: Engine mechanical, fuel system, ignition system, cooling system, lubrication system, exhaust system, emission control systems Transmission Drivetrain: Automatic transmission, manual transmission (if applicable for the 280SE variant), clutch, driveshaft, differential, axles Brakes Suspension Steering: Brake system (front and rear), hydraulic system, power steering, suspension components (front and rear), steering linkage Electrical Systems: Battery, charging system, starting system, lighting system, instrumentation, power windows, central locking, wiring diagrams Body Chassis: Body panels, doors, windows, interior trim, bumpers, chassis components, structural repair Climate Control: Service and repair of the heating and air conditioning (if equipped) system, including component removal and replacement. Procedures Included Maintenance Procedures: Scheduled maintenance, fluid checks and changes, filter replacements, lubrication, tune-up procedures Repair Procedures: Removal, installation, disassembly, assembly, adjustment, and repair of all major components and systems Troubleshooting Diagnostics: Diagnostic charts, symptom analysis, common problems, testing procedures for various systems Engine Rebuild: Detailed procedures for engine disassembly, inspection, component replacement, and reassembly. Fuel System Diagnosis: Specific guidance on diagnosing and repairing K-Jetronic fuel injection system faults, including fuel pressure testing. Technical Depth Technical Detail Level: Comprehensive step-by-step procedures, detailed explanations, pictorial diagrams, exploded views, torque specifications, wear limits, service data Wiring Diagrams: Includes comprehensive electrical system wiring diagrams for easier troubleshooting of electrical issues. Special Tool References: References specific Mercedes-Benz service tool numbers and illustrates their usage, crucial for accurate repairs. 📊 Manual Specifications File Format File Type: Portable Document Format (PDF) Print Quality Printability: Printable on demand, all pages can be printed Binding Type Binding Type: Digital (Instant Download) Paper Type Digital Paper Emulation: Simulates a high-quality printed manual with clear text and diagrams Software Requirements Reader Requirement: Adobe Reader or compatible PDF viewer Compatibility Operating Systems: Windows, macOS, Linux OS ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-cylinder, SOHC Engine Code: M110 (likely for 280SE) Performance Displacement: 2.8 Liters (2789 cc) Bore X Stroke: 86.0 mm x 80.25 mm Compression Ratio: Approximately 8.0:1 or 8.7:1 (depending on specific market/version) Horsepower Output: Approximately 155-185 hp (DIN) at 5500 rpm (varies by market and injection system) Torque Output: Approximately 230-245 Nm (DIN) at 4000 rpm (varies by market and injection system) Fuel System Fuel Delivery: Bosch K-Jetronic (CIS) fuel injection Fuel Type: Unleaded gasoline (91 RON recommended) Lubrication Oil Capacity: Approx. 7.5 liters (with filter) Recommended Oil Viscosity: SAE 10W-40 or 15W-40 (check manual for climate-specific recommendations) 🔧 Transmission Standard Transmission Type Standard: 4-speed Automatic (e.g., 722.1) Optional Transmission Type Optional: 4-speed or 5-speed Manual (less common for 280SE, but existed) Features Torque Converter Lockup: Present on automatic transmissions for improved efficiency Fluid Specifications Automatic Transmission Fluid: Mercedes-Benz Specification 236.6 or 236.7 (e.g., ATF Dexron II) 📐 Dimensions Exterior Length: Approx. 4725 mm (186.0 in) Width: Approx. 1785 mm (70.3 in) Height: Approx. 1420 mm (55.9 in) Wheelbase: Approx. 2795 mm (110.0 in) Weights Curb Weight: Approx. 1500-1600 kg (3300-3530 lbs) Gross Vehicle Weight Rating: Approx. 2000-2100 kg Wheels Tires Wheel Bolt Pattern: 5x112 mm Standard Tire Size: 175 R14 or 185/70 R14 🛡️ Safety Features Ratings Crash Safety Era: Designed to contemporary safety standards of the era, emphasizing structural integrity and driver protection. Lacked modern electronic safety aids. Active Features Active Safety Systems: Four-wheel disc brakes (standard on 280SE), collapsible steering column Passive Features Passive Safety Features: Reinforced passenger cell, impact-absorbing bumpers, laminated front windshield 💡 Technology Features Infotainment Original Infotainment: Analog radio (AM/FM), often with cassette player; manual or power antenna. Driver Assistance Driver Assistance Features: Limited to cruise control (optional) and power steering. No ABS or airbags as standard. Connectivity Connectivity Options: None from the factory; aftermarket solutions would be required for modern connectivity. 🔧 Maintenance Service Intervals Oil And Filter Change: Typically every 7,500-10,000 miles or 12 months (refer to manual for exact intervals) Major Service Intervals: Major service items like spark plugs, fuel filter, air filter, and coolant service at specified intervals (e.g., 30,000-50,000 miles) Fluid Specifications Coolant Type: Ethylene glycol-based antifreeze (e.g., Mercedes-Benz Specification 325.0) Brake Fluid Type: DOT 3 or DOT 4 Known Issues Common Wear Items:...