🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 300D Turbo Model Generation: Second Generation (often referred to as W123 II) Production Years Covered: 1982-1985 Codes Chassis Code: W123 Engine Code Designation: OM617.952 (3.0L Inline 5-Cylinder Diesel with Turbocharger) 👋 Introduction Market Position Target Audience: Professional technicians, experienced DIY mechanics, and owners seeking to understand and perform maintenance/repairs on their W123 300D Turbo. Competitive Analysis Manual Advantage: Official factory manual ensures accuracy and completeness, often superior to aftermarket alternatives. Instant download provides immediate access to critical repair information. Key Features Content Highlight: Hundreds of pages, step-by-step instructions, exploded view diagrams, critical specifications, and comprehensive system coverage. Value Proposition Owner Empowerment: Empowers owners to make informed decisions regarding maintenance and repairs, potentially saving significant costs and ensuring proper care. 📋 Manual Details Coverage Areas Vehicle Coverage: All W123 300D Turbo models produced between 1982 and 1985, encompassing all styles (sedan, coupe, wagon, etc.) Page Count Estimated Page Count: Hundreds of pages (exact count not specified, but implies comprehensive factory documentation) Manual Type Manual Type: Complete Official Full Factory Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine System: Detailed diagnostics, repair, overhaul, and component specifics for the OM617.952 3.0L turbocharged inline-5 diesel engine. Fuel System: Bosch fuel injection pump system, glow plug system, fuel filters, lines, and tank servicing. Cooling System: Radiator, water pump, thermostat, hoses, coolant types, and troubleshooting. Lubrication System: Oil pump, oil filter, oil pan, oil pressure, and lubrication specifications. Ignition System: Glow plug system, starting system, battery, and charging system. Transmission System: Service and repair for both manual and automatic transmissions, including fluid types, capacities, and shift linkage adjustments. Drivetrain System: Propeller shaft, universal joints, rear axle, differential, and wheel bearings. Suspension System: Front and rear suspension components, springs, shock absorbers, control arms, ball joints, and steering linkage. Braking System: Front and rear disc brakes, hydraulic system, brake fluid specifications, bleeding procedures, parking brake. Steering System: Power steering system, steering box, steering column, tie rods, and alignment specifications. Electrical System: Wiring diagrams, fuses, relays, lighting, gauges, power windows, wipers, and HVAC controls. Body And Chassis: Body panel removal/installation, doors, hood, trunk, glass, interior trim, and structural components. HVAC System: Heating, ventilation, and air conditioning system diagnosis and repair, refrigerant servicing. Exhaust System: Exhaust manifolds, catalytic converter (if applicable for market), muffler, and pipes. Procedures Included Maintenance Procedures: Regular service checks, oil changes, filter replacements, fluid checks and top-offs, belt adjustments, and lubrication. Repair Procedures: Step-by-step instructions for component repair and replacement across all major vehicle systems. Troubleshooting Guides: Diagnostic flowcharts and symptom-based troubleshooting for common issues. Disassembly And Assembly: Detailed instructions for taking apart and reassembling components and systems. Cleaning And Reinstallation: Procedures for cleaning components before reassembly and proper reinstallation techniques. Torque Specifications: Crucial torque values for fasteners to ensure correct assembly and prevent damage. Technical Depth Depth Of Coverage: Comprehensive, covering everything from basic maintenance to advanced engine overhaul and electrical diagnostics, suitable for both DIY and professional technicians. 📊 Manual Specifications File Format File Type: PDF Print Quality Printability: Full Printable - Allows printing of the entire manual or selected pages. Binding Type Binding Type: N/A (Digital Download - Printable) Paper Type Paper Type: N/A (Digital Download - Printable) Zoom Capabilities Zoom In Out: YES - Allows for detailed viewing of diagrams and text. Delivery Method Delivery: Instant Download Requirements Software Requirements: Adobe PDF Reader, WinZip (for potential archive extraction) Compatibility Operating Systems: Compatible with All Versions of Windows & Mac ⚙️ Engine Specifications Primary Engine Engine Type: Turbocharged Direct Injection Diesel Displacement: 3.0 Liters (2998 cc) Configuration: Inline 5-Cylinder Bore X Stroke: 87.0 mm x 84.0 mm (approximate, subject to variation) Performance Horsepower Approximate: 125 hp @ 4350 rpm (varies slightly by market and specific year) Torque Approximate: 180 lb-ft @ 2400 rpm (varies slightly by market and specific year) Fuel System Fuel Injection: Bosch inline mechanical injection pump with turbocharger boost compensation. Fuel Type: Diesel fuel (refer to manual for specific cetane rating recommendations) Engine Features Turbocharger Details: Garrett AiResearch (or similar) turbocharger with wastegate control. 🔧 Transmission Standard Transmission Type Available: 4-speed Manual Transmission (often standard on base models) and 4-speed Automatic Transmission (common option). Optional Automatic Transmission Model: Mercedes-Benz 722.118 or 722.119 4-speed automatic (specific variant depends on model year and market). Features Automatic Transmission Features: Hydraulic torque converter, torque limiting in first gear for smoother acceleration, and a lockout mechanism for efficient highway cruising. 📐 Dimensions Exterior Body Styles: Saloon (Sedan), Estate (Wagon), Coupe, Limousine (rare) Weights Curb Weight Approximate: 3,300 - 3,600 lbs (1500 - 1630 kg), depending on body style and equipment. 🛡️ Safety Features Ratings Crash Test Performance: The W123 chassis was renowned for its robust construction and safety engineering for its era, featuring a crumple zone design. Specific official...