🏷️ Basic Information Identification Make: Mercedes-Benz Model: 200D Model Code: W123 (specific sub-models like 200 D) Chassis Code: W123 Generation Generation Designation: First Generation W123 Codes Engine Code Family: OM615 (for 2.0L Diesel) 👋 Introduction Market Position Positioning: The Mercedes-Benz W123 series, particularly the 200D, was positioned as a robust, reliable, and durable executive sedan known for its exceptional build quality and longevity, especially favored in markets valuing fuel efficiency and low running costs. Competitive Analysis Competitors: Competed with other European executive sedans like BMW's 5 Series (E12/E28), Audi 100, and Volvo 240 series. The 200D's diesel engine offered superior fuel economy compared to many gasoline counterparts. Key Features Vehicle Highlights: Exceptional build quality, renowned durability, spacious and comfortable interior, strong diesel engine reputation, and classic Mercedes-Benz styling. Manual Value Proposition Value For Owner: Essential resource for owners seeking to maintain, repair, or restore their W123 200D, enabling cost-effective DIY maintenance and ensuring proper repair procedures are followed. 📋 Manual Details Coverage Areas Coverage Years: 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985 Covered Models: Mercedes-Benz 200D (W123 Series Sedans, Coupes, Estates, and Long Wheelbase Variants) Page Count Estimated Page Count: Approximately 800-1200 pages (typical for comprehensive service manuals of this era, actual may vary based on specific publisher and edition) Manual Type Manual Type: Service and Repair Manual Content Focus: Comprehensive diagnostics, repair, maintenance, and overhaul procedures. Language Language: English Format Format: PDF Download (as indicated by 'Pdf Download') 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul, cylinder head, pistons, crankshaft, camshaft, timing, lubrication system, cooling system. Engine Fuel System: Injection pump (Bosch VE), injectors, fuel lines, glow plug system, fuel filter replacement. Transmission Manual: Clutch, gearbox overhaul, shifting mechanisms, fluid changes, driveshafts. Transmission Automatic: Overhaul of automatic transmission, hydraulic control, fluid changes, adjustments (if applicable to 200D variants). Brakes: Hydraulic system, master cylinder, wheel cylinders, brake calipers, brake pads/shoes, parking brake, bleeding procedures, ABS (if equipped on later models). Steering: Power steering system, steering box, tie rods, steering column, alignment specifications. Suspension: Front and rear suspension components, shock absorbers, springs, control arms, bushings, wheel bearing replacement, alignment. Electrical System: Battery, starter, alternator, ignition system (for gasoline variants, less relevant for 200D but general electrical coverage), lighting, wipers, horn, fuses, relays. Body And Chassis: Body panel repair, door mechanisms, interior trim, glass replacement, rust prevention, chassis lubrication. HVAC: Heating system, ventilation, air conditioning (if factory fitted), refrigerant charging, component replacement. Procedures Included Preventative Maintenance: Scheduled maintenance checks, oil changes, filter replacements, fluid top-offs, belt inspections, spark plug checks (for gasoline). Diesel specific: glow plug testing, fuel filter replacement. Troubleshooting Diagnostics: Systematic diagnostic procedures for common and uncommon faults, symptom-based troubleshooting guides, electrical wiring diagrams with diagnostic paths. Repair Overhaul: Step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation for all major systems. Special Tools: Identification and usage instructions for specialized tools required for specific repair procedures. Torque Specifications: Detailed torque values for critical fasteners across all systems. Technical Depth Depth Level: Comprehensive (from basic fluid changes to full engine and transmission rebuilds). Diagnostic Capability: Advanced diagnostic procedures, including component testing and electrical circuit analysis. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable, allowing for quick location of specific information. Print Quality Print Quality: Generally good to very good for digital scans of original factory manuals, including clear diagrams and schematics. Binding Type Binding Type: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated Inline-4 Cylinder Diesel Engine Code: OM615.940 (typically) Displacement: 1988 cc (2.0 Liters) Bore X Stroke: 87.0 mm x 84.0 mm Compression Ratio: 21.0:1 (approximate) Performance Horsepower Hp: 55-60 hp (approximate, varies by market and specific variant) Torque Lb Ft: 81-85 lb-ft (approximate, varies by market and specific variant) Fuel System Fuel Injection: Bosch VE (Variable Speed) Rotary Injection Pump, Indirect Injection Fuel Type: Diesel Fuel Cooling System Coolant Capacity: Approximately 8.0 - 9.0 Liters (check specific manual for exact) Lubrication System Oil Capacity Liters: Approximately 6.0 - 6.5 Liters (with filter, check manual) Recommended Oil Viscosity: API CD or CE rated Diesel Oil, SAE 15W-40 or 10W-30 depending on climate (refer to manual for precise recommendations) Glow Plug System Glow Plug Type: Pre-combustion chamber glow plugs, typically requiring a 5-15 second heat-up time. 🔧 Transmission Standard Standard Transmission Type: 4-Speed Manual Transmission Optional Optional Transmission Type: 4-Speed Automatic Transmission (often referred to as 'Hydrak ' or later 722.1/722.2 series) Features Clutch Type: Single dry plate diaphragm clutch (manual) Fluid Specs Manual Transmission Fluid Type: GL-4 Hypoid Gear Oil, SAE 80W/90 (check manual for specific MB specification, e.g., MB 235.0) Automatic Transmission Fluid Type: Dexron II or equivalent (MB specification 236.3 or similar, check manual) 📐 Dimensions Exterior Length Mm: 4725 mm (Sedan) Width Mm: 1785 mm (Sedan) Height...