🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 280E Years Covered: 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985 Body Styles Covered: Sedan (W123), Estate/Station Wagon (S123), Coupe (C123), Long Wheelbase Sedan (V123) Codes Chassis Code: W123 👋 Introduction Market Position Target Audience: Owners of Mercedes-Benz W123 280E models seeking to perform their own maintenance and repairs, as well as independent repair shops. Competitive Analysis Source Authenticity: Official factory service manual, providing accurate and authorized repair information, distinguishing it from unofficial or third-party guides. Key Features Content Detail: Hundreds of pages of detailed instructions, illustrations, diagrams, and specifications, mimicking the knowledge of factory-trained technicians. Usability: User-friendly interface, enabling easy navigation and printing of specific sections or the entire manual. Value Proposition Cost Savings: Enables owners to save significantly on labor costs by performing their own servicing. 📋 Manual Details Coverage Areas Primary Focus: Complete factory service and repair Scope: All maintenance, troubleshooting, diagnostics, and repair procedures for the specified model and years. Page Count Estimated Pages: Hundreds of pages (specific count not provided, but described as 'complete' and 'comprehensive') Manual Type Type: Factory Service Repair Manual (Official) Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Service: Complete engine overhaul, diagnosis, repair, and tuning for the M110 2.8L inline-six engine. Fuel System: Fuel injection system (Bosch K-Jetronic), fuel pump, lines, filter, injectors, and fuel tank service. Ignition System: Ignition system components, timing, troubleshooting, and repair. Transmission Service: Manual and automatic transmission overhaul, repair, fluid changes, and troubleshooting. Drivetrain: Differential, axles, driveshaft, universal joints, and rear axle service. Brakes: Hydraulic brake system, calipers, master cylinder, brake lines, rotors, pads, and parking brake service. Suspension: Front and rear suspension components, shock absorbers, springs, control arms, bushings, and alignment. Steering: Power steering system, steering box, linkages, and troubleshooting. Cooling System: Radiator, water pump, thermostat, hoses, fan, and coolant service. Electrical System: Full coverage of all electrical components, wiring diagrams, lighting, charging system (alternator/generator), starting system (starter), and battery service. Climate Control: Heater core, ventilation system, air conditioning system (if equipped), and related components. Chassis Body: Body structure, doors, hood, trunk, fenders, bumpers, glass, and related hardware. Interior: Seats, dashboard, trim panels, headliner, and related interior components. Emission Control: Emission control systems, catalytic converter (if applicable), and related components. Restraint System: Seat belts and other passive safety restraint systems. Procedures Included Maintenance: Routine maintenance, fluid checks and changes, filter replacements, belt adjustments, and general servicing. Troubleshooting: Comprehensive diagnostic procedures and troubleshooting guides for common and uncommon issues. Repair: Step-by-step repair instructions for all major and minor components and systems. Rebuilding: Detailed procedures for rebuilding major components such as engines and transmissions. Diagnostics: Advanced diagnostic techniques for identifying and resolving mechanical and electrical faults. Wiring Diagrams: Complete and detailed electrical wiring diagrams for all vehicle systems. Technical Depth Depth: Factory-level technical information, suitable for professional technicians and experienced DIY mechanics. Covers everything from basic adjustments to complete overhauls. 📊 Manual Specifications File Format Format: PDF Compatibility: All PC based Windows operating systems and Mac OS. Requires Adobe PDF Reader. Print Quality Printability: Fully printable. Users can print the entire manual or specific pages. Binding Type Binding: Not Applicable (Downloadable PDF) Paper Type Paper Type: Not Applicable (Digital Format) Digital Features Searchability: Searchable PDF allows for quick finding of information. Storage: Can be saved to hard drive or burned to CD-ROM. ⚙️ Engine Specifications Primary Engine Engine Code: M110.98x Engine Type: 2.8 Liter (2746 cc) SOHC Inline-Six Cylinder Bore X Stroke: 86.0 mm x 79.0 mm Performance Horsepower Est: 182-185 hp @ 5800-6000 rpm (Varies slightly by year and market) Torque Est: 222-228 lb-ft @ 3500-4500 rpm (Varies slightly by year and market) Fuel System Fuel Delivery: Bosch K-Jetronic Mechanical Fuel Injection Recommended Fuel: Unleaded gasoline (87+ octane) Cooling System Coolant Type: Ethylene glycol-based coolant (typically 50/50 mix with distilled water) Lubrication Engine Oil Capacity: Approximately 6.5 - 7.0 liters (6.9 - 7.4 US quarts) with filter change. Engine Oil Specification: Refer to manual for specific viscosity grades (e.g., 20W-50, 15W-40) based on ambient temperature. API service classification SG or equivalent recommended. 🔧 Transmission Standard Transmission Type: 4-speed Manual Transmission (common in early models) Optional Transmission Type: 4-speed Automatic Transmission (e.g., 4G-TRONIC 722.1/722.3, often optional) Features Automatic Features: Torque converter, hydraulic control. Specific shift points and modes can be adjusted. Fluid Specifications Automatic Transmission Fluid: MB Specification 236.1 (e.g., Dexron II or equivalent). Capacity approx. 7-8 liters. Manual Transmission Fluid: API GL-4 or GL-5 gear oil, viscosity typically 75W-90 or 80W-90. Capacity approx. 1.5-2.0 liters. 📐 Dimensions Exterior Wheelbase: 2794 mm (110.0 inches) Length: 4725 mm (186.0 inches) Width: 1790 mm (70.5 inches) Height: 1440 mm (56.7 inches) Weights Curb Weight Est: 1400-1550 kg (3086-3417 lbs) depending on body style and options. Gross Vehicle Weight Rating Est: Approx. 2000 kg...