🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 Variant: 280E Year: 1983 Codes Chassis Code: W123 Engine Code Typical: M110 👋 Introduction Market Position Target Audience: Do-it-yourselfers and experienced mechanics seeking comprehensive repair and maintenance data for the Mercedes-Benz W123 280E. Competitive Analysis Value Proposition: An inexpensive way to keep the vehicle working properly by providing expert-level repair information. Key Features Completeness: Complete official full factory service repair manual. Diagnostic Focus: Strong emphasis on diagnosing and repairing electrical system problems with integrated wiring diagrams. 📋 Manual Details Coverage Areas Documentation Scope: Complete official full factory service repair manual Applicable Styles: All styles covered (sedan, coupe, wagon, etc. for the W123 280E) Page Count Estimated Pages: Hundreds Manual Type Type: Workshop Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed coverage of engine disassembly, assembly, timing, lubrication, cooling, and emissions systems. Fuel System: In-depth diagnosis and repair of fuel injection systems (Bosch K-Jetronic), fuel pumps, lines, and filters. Ignition System: Troubleshooting and repair of ignition coils, distributors, spark plugs, and timing. Transmission Manual: Service and repair procedures for manual transmissions, including clutch operation and adjustments. Transmission Automatic: Comprehensive diagnostic and repair information for automatic transmissions (e.g., 4-speed 722.1). Drivetrain: Front suspension, rear axle, driveshaft, and differential servicing. Brakes: Detailed procedures for hydraulic system maintenance, brake pad/shoe replacement, caliper/wheel cylinder service, and parking brake. Steering: Power steering system diagnosis, repair, and fluid service. Suspension: Front and rear suspension component inspection, replacement, and alignment procedures. Electrical System: Extensive coverage including starter, alternator, battery, lighting, fuses, relays, and wiring diagrams. Climate Control: Diagnosis and repair of heating and ventilation systems. Body And Trim: Procedures for door panel removal, glass replacement, and interior trim adjustments. Procedures Included Maintenance: Routine maintenance tasks such as oil changes, filter replacements, and fluid level checks. Troubleshooting: Systematic diagnostic flowcharts and troubleshooting guides for common and uncommon issues. Repair: Step-by-step repair instructions for all major vehicle components. Rebuilds: Detailed procedures for engine and transmission rebuilds. Electrical Diagnostics: Combined troubleshooting and electrical service procedures with detailed wiring diagrams. Technical Depth Level Of Detail: Designed for both do-it-yourselfers and experienced mechanics; provides complete disassembly and reassembly instructions. Visual Aid Quality: Hundreds of photos, illustrations, and drawings for clear guidance. Instruction Format: Numbered instructions, detailed substeps, notes, cautions, and warnings. Illustrations Highlighting: Bold figure numbers to match illustrations with instructions, enlarged inset views for detailed part examination. 📊 Manual Specifications File Format Format: PDF Compatibility: Works on all PC-based Windows operating systems and Mac. Storage And Usage: Can be saved to hard drive, burned to CD-ROM. Print Quality Printability: Printable without any restriction (entire manual or individual pages). Binding Type Binding: Digital Download (implies no physical binding) Paper Type Paper Quality: N/A (Digital Download) Requirements Software Requirement: Adobe PDF Reader Delivery Method: Download link available on checkout page after payment. Advantages: No shipping costs or waiting time for physical delivery. ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-cylinder, 4-stroke Engine Code: M110.984 (typical for 280E in 1983) Performance Displacement: 2.8 Liters (2799 cc) Bore X Stroke: 86.5 mm x 80.25 mm Compression Ratio: 8.3:1 (typical) Horsepower Net Approx: 185 PS (182 bhp; 136 kW) at 5800 rpm (DIN, typical for M110.984) Torque Net Approx: 240 Nm (177 lb-ft) at 4500 rpm (DIN, typical for M110.984) Fuel System Fuel Delivery: Bosch K-Jetronic CIS (Continuous Injection System) Fuel Type: Unleaded gasoline (Premium / Super) Cooling System Type: Water-cooled 🔧 Transmission Standard Type: 4-speed manual transmission (e.g., Getrag 265) or 4-speed automatic transmission (e.g., Mercedes 722.1) Optional Type: 4-speed automatic transmission Features Clutch Type: Single dry plate, hydraulically operated (for manual) 📐 Dimensions Exterior Wheelbase: 2795 mm (110.0 in) Length: 4725 mm (186.0 in) Width: 1790 mm (70.5 in) Height: 1430 mm (56.3 in) Weights Curb Weight Approx: 1430 kg (3153 lbs) for sedan with automatic transmission 🛡️ Safety Features Ratings Historical Safety Standards: Designed to meet or exceed safety standards of its era, with a focus on structural integrity and occupant protection. Active Features Braking System: Four-wheel disc brakes (front ventilated), power assisted. Passive Features Chassis Design: Reinforced safety cage, crumple zones. Steering Column: Collapsible steering column. 💡 Technology Features Infotainment Audio System: Factory-installed Becker radio/cassette player with potential for upgraded sound systems. Driver Assistance Cruise Control: Optional cruise control system available on some models. Connectivity Original Connectivity: Basic in-car communication via radio; no integrated mobile phone or GPS systems. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 7,500 - 15,000 km (4,500 - 9,000 miles) or 12 months, depending on driving conditions and oil used (refer to manual for exact recommendation). Filter Replacement: Oil filter with every oil change; air filter and fuel filter typically every 15,000 - 30,000 km (9,000 - 18,000 miles). Fluid Specifications Engine Oil Grade: API SF or SG,...