🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 (200D, 240D, 240TD, 300D, 300TD) Product Name: Mercedes-benz W123 200d 240d 240td 300d 300td Service Repair Manual 1976-1985 Production Years Covered: 1976-1985 Codes Chassis Code: W123 👋 Introduction Market Position Target Audience: Mercedes-Benz W123 owners, DIY enthusiasts, professional mechanics. Competitive Analysis Value Proposition: Provides professional-level repair information to enable cost savings on maintenance and repairs. Key Features Ease Of Use: Easy to follow, step-by-step instructions for all skill levels. Accessibility: Instant download for immediate access, no shipping or waiting. 📋 Manual Details Coverage Areas Manual Scope: Complete repair and service information Page Count Page Count: Not specified (implied comprehensive) Manual Type Manual Type: Digital Service Repair Manual Language Language: English Format File Format: PDF Downloadable: YES Compatibility Operating Systems: All Versions of Windows & Mac Requirements Software Requirements: Adobe PDF Reader 📖 Manual Coverage Systems Covered Engine Mechanical: Full engine overhaul, rebuilding, maintenance, diagnostics for OM615, OM616, OM617 diesel engines. Fuel System: Diesel injection systems (Bosch VE, Bosch MW), fuel pumps, injectors, fuel lines, tank. Transmission Manual: Manual transmission (4-speed, 5-speed) service, repair, and overhaul. Transmission Automatic: Automatic transmission (3-speed, 4-speed) service, repair, and overhaul, including hydraulic control systems. Drivetrain: Driveshafts, universal joints, rear axle, differential service and repair. Suspension: Front and rear suspension systems, control arms, ball joints, tie rods, shock absorbers, springs. Steering: Power steering system, steering box, steering column, linkages. Brakes: Front and rear disc/drum brakes, hydraulic system, ABS (if equipped), parking brake. Electrical System: Battery, alternator, starter, ignition system (if gasoline variant covered), lighting, wiring diagrams, fuses, relays. Body And Chassis: Body construction, doors, windows, interior trim, rust repair, frame straightening. Heating And Ventilation: HVAC system, blower motor, heater core, climate control. Procedures Included Maintenance Procedures: Oil changes, filter replacements, coolant flushes, lubrication, belt adjustments, spark plug (if applicable) replacement. Troubleshooting: Diagnostic procedures for common and uncommon problems across all systems. Repair Procedures: Step-by-step instructions for component removal, repair, and reinstallation. Rebuilding Procedures: Detailed guides for engine and transmission rebuilds. Restoration Guidance: Information useful for restoring the vehicle to its original condition. Technical Depth Depth Of Coverage: Comprehensive, from basic maintenance to full engine and transmission rebuilds, suitable for professional technicians and DIY enthusiasts. Diagnostic Capabilities: Includes diagnostic charts and flowcharts for identifying issues. Schematics: Detailed electrical wiring diagrams. 📊 Manual Specifications File Format File Type: PDF Print Quality Printability: All pages are printable for workshop use. Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) Content Features Visual Aids: Illustrations, diagrams, pictures. Instructions: Step-by-step instructions, procedures. Searchability: Likely searchable text within the PDF format. ⚙️ Engine Specifications Primary Engine Engine Codes Covered: OM615 (200D), OM616 (240D, 240TD), OM617 (300D, 300TD) Engine Type: Naturally Aspirated Inline-4 and Inline-5 Diesel Engines 200D Displacement: 1988 cc (1.988 L) 240D Displacement: 2399 cc (2.399 L) / 2404 cc (2.404 L) 300D Displacement: 2998 cc (2.998 L) / 3005 cc (3.005 L) Performance 200D Horsepower Approx: 55-70 hp (varies by market and year) 240D Horsepower Approx: 65-72 hp (varies by market and year) 300D Horsepower Approx: 70-88 hp (varies by market and year) Fuel System Injection System: Bosch inline injection pump (VE or MW) and injectors Fuel Type: Diesel fuel Cooling System Cooling Type: Liquid-cooled Lubrication Oil Capacity: Approx. 6-7 liters (check manual for specific engine) 🔧 Transmission Standard Available Transmissions: 4-speed manual, 5-speed manual, 3-speed automatic, 4-speed automatic Features Automatic Transmission Type: Hydraulic automatic transmission Fluid Specifications Automatic Transmission Fluid Type: MB 236.1 specification automatic transmission fluid (e.g., Dexron II compatible) Manual Transmission Fluid Type: GL-4 gear oil (e.g., SAE 75W-90 or 80W-90) 📐 Dimensions Exterior Body Styles: Saloon (4-door sedan), Estate (S123 wagon) Weights Curb Weight: Approx. 1300-1500 kg (varies by model and equipment) 🛡️ Safety Features Active Features Brakes: Front disc brakes, rear drum brakes (later models may have rear discs). Optional ABS on some later models. Passive Features Seatbelts: Standard seatbelts; pre-tensioners introduced later in the production run. 💡 Technology Features Infotainment Original Features: Basic AM/FM radio, optional cassette player, analog gauges. Driver Assistance Driver Assistance Systems: Optional ABS on later models, primarily mechanical systems otherwise. Connectivity Original Connectivity: N/A (Pre-digital era connectivity) 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000 - 10,000 km or annually (refer to manual for precise intervals). Air Filter Replacement: Every 15,000 - 20,000 km or as needed. Fuel Filter Replacement: Every 20,000 - 30,000 km or annually. Fluid Specifications Engine Oil Specification: API CD or CE rated diesel engine oil, viscosity SAE 10W-40 or 15W-40 depending on climate. Coolant Specification: Mercedes-Benz approved coolant (e.g., MB 325.0) or equivalent ethylene glycol-based antifreeze, mixed 50/50 with distilled water. Known Issues Common Wear Items: Glow plugs, vacuum lines, fuel injection pump seals, suspension bushings, heater control valves, exhaust systems, climate control actuators. Rust Prone Areas: Wheel arches, door...