🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 280, 280C, 280CE Codes Chassis Code: W123 Generation Generation: First Generation W123 👋 Introduction Market Position Target Audience: DIY enthusiasts, independent repair shops, and Mercedes-Benz W123 owners seeking comprehensive technical information. Competitive Analysis Value Proposition: Provides professional-grade repair and maintenance information, enabling significant cost savings compared to dealership or independent shop labor. Key Features Instructional Style: Step-by-step instructions, numbered procedures, clear illustrations, diagrams, and photos. Information Source: Original manufacturer documentation, reflecting the same information used by authorized service centers. 📋 Manual Details Coverage Areas Covered Models: All W123 Sedan, Coupe (C), and CE models with 280, 280C, 280CE designations Covered Years: 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985 Page Count Page Count Estimate: Hundreds of pages (as indicated by description, exact count not provided) Manual Type Manual Type: Workshop Service and Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Service: Complete engine diagnostics, repair, and overhaul procedures for 2.8L M110 engine variants. Transmission Service: Service and repair for both manual and automatic transmissions (e.g., 4-speed manual, 3-speed automatic, 4-speed automatic). Brake System: Detailed procedures for hydraulic system maintenance, component replacement (pads, rotors, calipers), parking brake. Electrical System: Comprehensive coverage including starting system, charging system, lighting, ignition, and accessories. Wiring Diagrams: Detailed wiring diagrams for all electrical circuits, aiding in troubleshooting and repair. Suspension: Front and rear suspension diagnostics, component replacement (shocks, springs, bushings), alignment specifications. Steering: Power steering system maintenance, steering gear repair, and component replacement. Cooling System: Radiator, water pump, thermostat, fan, and heater core service; coolant specifications and capacities. Fuel Injection Fuel System: In-depth coverage of Bosch K-Jetronic fuel injection system, fuel pump, filters, and injectors. Emission System: Information on emission control components and related maintenance. HVAC: Heating, ventilation, and air conditioning system diagnostics and repair. Chassis Body: Bodywork, chassis components, body repairs, and adjustments. Restraint System: Seat belts and related safety systems. Interior: Interior trim, dashboard, and component repair. Differential Drive: Rear axle and differential service, lubricant specifications. Axle: Front and rear axle component inspection and service. Procedures Included General Maintenance: Scheduled maintenance, fluid checks, filter replacements, lubrication. Troubleshooting: Systematic diagnostic procedures for identifying and resolving common and complex issues. Engine Repair: Engine disassembly, inspection, reassembly, component repair (pistons, rings, valves, bearings). Transmission Repair: Transmission overhaul, clutch replacement (manual), torque converter service (automatic). Brake Repair: Brake bleeding, caliper rebuilding, master cylinder replacement, brake line repairs. Electrical System Repair: Component testing and replacement, wiring harness repair, troubleshooting electrical faults. Suspension Repair: Ball joint replacement, control arm bushings, shock absorber installation. Periodic Lubrication: Detailed lubrication points and recommended schedules. Steering Repair: Tie rod end replacement, steering rack adjustment and repair. Cooling System Repair: Water pump replacement, thermostat housing seal replacement, radiator hose replacement. Fuel System Repair: Fuel injector cleaning and replacement, fuel pressure regulator testing, fuel pump troubleshooting. HVAC Repair: A/C compressor service, evaporator core replacement, heater control valve service. Chassis Body Repair: Door hinge adjustment, panel replacement, rust repair guidance. Differential Drive Repair: Rear axle bearing replacement, differential gear inspection. Technical Depth Depth Of Information: Comprehensive, covering all aspects from basic maintenance to major component overhaul and diagnostics, as used by professional technicians. Diagnostic Capabilities: Advanced diagnostic procedures, including troubleshooting electrical systems with wiring diagrams. Rebuild Procedures: Detailed instructions for engine and transmission disassembly, cleaning, inspection, and reassembly. 📊 Manual Specifications File Format File Format: PDF Print Quality Print Quality: Full Printable Zoom Functionality Zoom In Out: Yes Requirements Software Requirements: Adobe PDF Reader, WinZip (for extraction if applicable) Compatibility Operating System Compatibility: All Versions of Windows & Mac Delivery Method Delivery: Instant Download ⚙️ Engine Specifications Primary Engine Engine Code: M110 Engine Type: Inline 6-cylinder, DOHC (Double Overhead Camshaft) Displacement: 2.8 Liters (2789 cc) Performance Horsepower Estimate: Approximately 138-142 hp (net) depending on year and configuration. Torque Estimate: Approximately 165-170 lb-ft (net) depending on year and configuration. Fuel System Fuel Injection System: Bosch K-Jetronic (CIS - Continuous Injection System) Fuel Type: Unleaded gasoline (premium recommended) 🔧 Transmission Standard Standard Transmission: 4-speed manual transmission (availability may vary by market and specific model year) Optional Optional Transmission: 4-speed automatic transmission (e.g., 4G-Tronic, 722.1) Features Transmission Oil Type: Refer to manual for specific ATF type (e.g., Dexron II) 📐 Dimensions Exterior Body Styles: Sedan, Coupe (C), CE (Coupe Electric fuel injection) Weights Curb Weight Estimate: Approximately 3100-3400 lbs (1400-1550 kg) depending on body style and equipment. 🛡️ Safety Features Passive Features Passive Safety: Front and rear crumple zones, padded interior surfaces, safety glass, seat belts. 💡 Technology Features Infotainment Infotainment System: Basic AM/FM radio, optional cassette player. HVAC controls are typically mechanical or vacuum-actuated. Driver Assistance Driver Assistance Features: Limited by era; primarily focused on mechanical systems and passive safety. Features like ABS were not standard on all models during this period....