🏷️ Basic Information Identification Make: Mercedes-Benz Model: G-Wagen Chassis Code: W460 Variant: 230G Codes Engine Code Primary: M123 (for 230G) Engine Code Alternative Mention: OM617 (for 240GD, common diesel variant within the era, though not the primary focus of this specific manual title) 👋 Introduction Market Position Positioning: The Mercedes-Benz G-Wagen (W460) occupied a unique niche as a highly capable off-road vehicle with luxury and refinement, bridging the gap between utilitarian off-roaders and premium SUVs. Competitive Analysis Competitors: Competed indirectly with vehicles like the Range Rover Classic, Toyota Land Cruiser (FJ60/62), and Jeep Grand Wagoneer, though its military origins and distinct Mercedes-Benz engineering set it apart. Key Features G Wagen Attributes: Robust ladder frame chassis, selectable four-wheel drive with locking differentials (often standard or optional across the range), strong body-on-frame construction, and a focus on durability and off-road prowess. 📋 Manual Details Coverage Areas Years Covered: 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991 Page Count Total Pages: 236 Manual Type Type: Workshop Service Manual Language Language: English (Assumed, standard for workshop manuals of this era and origin) Format Format: PDF 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, tuning, diagnosis, fuel system, lubrication, cooling, ignition (for gasoline M123 engine). Transmission: Manual and automatic transmission service, repair, and overhaul. Drivetrain: Transfer case, differentials, driveshafts, axles, CV joints, and hub mechanisms. Suspension: Front and rear suspension components, shock absorbers, springs, control arms, bushings, and steering linkage. Brakes: Front disc and rear drum brake systems, hydraulic lines, master cylinder, calipers, wheel cylinders, parking brake. Electrical System: Wiring diagrams, starter, alternator, battery, lighting system, ignition system, instrumentation, fuses, relays, and common electrical faults. Fuel System: Carburetor (Zenith Stromberg or similar for 230G), fuel pump, fuel lines, fuel tank, and emissions control systems. Body And Chassis: Body panel removal and installation, chassis frame inspection and repair, doors, windows, seats, and interior trim. Cooling System: Radiator, fan, water pump, thermostat, hoses, and coolant. Exhaust System: Exhaust manifold, catalytic converter (if applicable), mufflers, and exhaust pipes. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks, lubrication points, and inspections. Repair: Detailed step-by-step repair procedures for all major mechanical and electrical components. Troubleshooting: Diagnostic charts, symptom analysis, and common problem resolution for various systems. Overhaul: Complete engine, transmission, and differential overhaul procedures with specifications. Adjustment: Carburetor tuning, ignition timing, valve clearance adjustment, and clutch adjustment. Torque Specifications: Essential torque values for critical fasteners across all systems. Technical Depth Depth: Comprehensive, covering from basic maintenance to in-depth mechanical and electrical repairs, suitable for professional technicians and advanced DIYers. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text within the PDF document for quick information retrieval. Print Quality Quality: High-resolution digital reproduction of original factory documentation, ensuring clear diagrams and legible text. Binding Type Binding: N/A (Digital PDF format) Paper Type Paper Type: N/A (Digital PDF format) ⚙️ Engine Specifications Primary Engine Engine Type: Inline-4 Cylinder, Overhead Valve (OHV) or Overhead Cam (OHC) depending on specific M123 variant. Displacement Cc: 2299 cc (for 230G) Bore X Stroke Mm: 87.0 mm x 95.0 mm (approximate for M123 family) Compression Ratio: 8.0:1 or 8.5:1 (typical for M123) Performance Horsepower Ps: 102-125 PS (approximate, varies by specific model year and configuration of the M123) Torque Nm: 165-180 Nm (approximate, varies by specific model year and configuration of the M123) Fuel System Fuel Delivery: Carburetor (e.g., Zenith Stromberg, Solex, or similar) Fuel Type: Unleaded Gasoline (Petrol) Ignition System Ignition Type: Distributor-based, points or electronic (depending on year). 🔧 Transmission Standard Transmission Type: 4-speed manual transmission (common for 230G in early years) Optional Transmission Type: 3-speed or 4-speed automatic transmission (optional, increasingly common through the production run). Features Transfer Case: 2-speed transfer case with selectable 4WD and optional differential locks (center, front, rear). Fluid Specifications Manual Transmission Fluid: API GL-4 or GL-5, SAE 75W-90 or 80W-90 gear oil (refer to manual for exact MB specification). Automatic Transmission Fluid: Mercedes-Benz Automatic Transmission Fluid (ATF) specification, likely DEXRON II or equivalent (refer to manual for exact MB specification). 📐 Dimensions Exterior Wheelbase Mm: 2400 mm (standard wheelbase for W460) Length Mm: 3745 mm (approximate for short wheelbase variants) Width Mm: 1760 mm (approximate) Height Mm: 1940 mm (approximate, varies with body style) Ground Clearance Mm: Approx. 200 mm (varies with tire size and suspension) Weights Curb Weight Kg: 1800 - 2000 kg (approximate, depends on body style and equipment) Gross Vehicle Weight Kg: Approx. 2700 kg (varies) Towing Capacity Kg: Up to 2000 kg (varies by configuration and region) 🛡️ Safety Features Ratings Crash Test Data: No formal NTHSA/Euro NCAP ratings for this era, designed to military/civilian robustness standards. Active Features Braking System: Power-assisted front disc brakes, rear drum brakes. ABS was not standard in this era. Passive Features Seat Belts: Standard three-point front seatbelts, lap...