🏷️ Basic Information Identification Make: Mercedes-Benz Model: 180 / 180a / 180b / 180c Codes Chassis Codes: W120 (180, 180a, 180b, 180c variants) Engine Codes: M136 (1.8L OHV Inline-4) 👋 Introduction Market Position Market Segment: Compact executive sedan/saloon. Competitive Analysis Key Competitors Era: BMW 1500/1800, Volkswagen Beetle (higher end), Opel Rekord, Ford Taunus. Key Features Design Philosophy: Robust construction, Mercedes-Benz quality and engineering, comfortable ride, reliable powertrain for its era. Model Variants Distinction: 180 (standard), 180a (improved engine), 180b (further engine refinement), 180c (long wheelbase variant, more spacious rear). 📋 Manual Details Coverage Areas Covered Regions: Global (primary focus on original manufacturer documentation) Page Count Page Count: 628 Manual Type Manual Type: Workshop Service Repair Manual Language Language: English (assumed based on common availability for global markets, original may have been German) Format Format: PDF (Portable Document Format) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, disassembly, inspection, overhaul, cylinder head, block, crankshaft, camshaft, pistons, connecting rods, valve train, lubrication system, cooling system. Fuel System: Carburetor systems (e.g., Solex), fuel pump, fuel lines, fuel tank, fuel filter replacement. Ignition System: Distributor, ignition coil, spark plugs, timing, ignition system troubleshooting. Transmission Manual: Manual gearbox overhaul, clutch replacement, gear shift linkage, driveshafts, universal joints. Suspension System: Front and rear suspension components, shock absorbers, springs, control arms, bushings, alignment. Braking System: Hydraulic drum brakes (front and rear), brake fluid replacement, bleeding procedures, brake shoe inspection and replacement, parking brake. Steering System: Steering box, steering column, tie rods, steering linkage, wheel alignment. Electrical System: Wiring diagrams, battery, alternator, starter motor, lighting systems, instrumentation, fuses, relays. Body And Chassis: Body panel removal and installation, doors, windows, interior trim, seat removal, chassis components. Procedures Included Routine Maintenance: Oil change intervals, lubrication points, filter replacement schedules, fluid checks and top-offs. Troubleshooting: Diagnostic procedures for common mechanical and electrical faults, symptom-based troubleshooting guides. Repair And Rebuild: Detailed step-by-step instructions for component repair, overhaul, and replacement. Component Adjustment: Carburetor tuning, ignition timing adjustment, brake adjustment, clutch adjustment. Technical Depth Depth Of Coverage: Comprehensive, covering everything from basic maintenance to complete engine and transmission rebuilds. Includes detailed diagrams and specifications. 📊 Manual Specifications File Format File Format: PDF Print Quality Print Quality: High-resolution, designed for clear printing of text and diagrams. Binding Type Binding Type: N/A (Digital PDF - no physical binding) Paper Type Paper Type: N/A (Digital PDF - no physical paper) ⚙️ Engine Specifications Primary Engine Engine Type: Inline-4, Overhead Valve (OHV) Displacement: 1.8 Liters (1767 cc) Bore X Stroke: 82 mm x 84 mm (typical) Compression Ratio: 7.8:1 to 8.0:1 (depending on variant and fuel octane) Horsepower: Approx. 50-65 hp (gross, depending on variant and tuning) Torque: Approx. 110-130 Nm (gross, depending on variant) Performance Top Speed: Approx. 120-135 km/h (75-84 mph) Fuel System Fuel Delivery: Single or twin-barrel downdraft carburetor (e.g., Solex 32 PAIA, Solex 34 PICT) Fuel Type: Unleaded gasoline (early models may have been designed for leaded) 🔧 Transmission Standard Transmission Type: 4-speed manual Optional Transmission Type Optional: Optional 4-speed Hydrak automatic transmission (less common, specific market availability) Features Clutch Type: Single dry plate clutch 📐 Dimensions Exterior Wheelbase: Approx. 2650 mm (104.3 inches) for standard models, longer for 'c' variant. Length: Approx. 4400-4600 mm (173.2-181.1 inches) depending on variant. Width: Approx. 1700 mm (66.9 inches) Height: Approx. 1500 mm (59.1 inches) Weights Curb Weight: Approx. 1200-1300 kg (2645-2866 lbs) Gross Vehicle Weight: Approx. 1600-1700 kg (3527-3748 lbs) 🛡️ Safety Features Ratings Safety Standards Era: Reflects safety standards of the late 1950s and early 1960s. Lacked modern crumple zones, airbags, ABS. Active Features Braking System Type: Hydraulic, drum brakes all around. Passive Features Body Construction: Unitized body construction with reinforced passenger cell for its time. Seatbelts: Optional or not standard on all models; typically lap belts if fitted. 💡 Technology Features Infotainment Audio System: Typically an optional factory-installed or dealer-fitted AM radio. Later models might have had FM reception. Driver Assistance Driver Assistance Features: None by modern standards. Basic features include power-assisted steering on some later models or specific variants, but not common. Connectivity Connectivity Features: None. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000 km (3,000 miles) or 6 months, whichever comes first. Tune Up Interval: Recommended every 10,000-15,000 km (6,000-9,000 miles), including ignition points, spark plugs, and carburetor adjustment. Fluid Specifications Engine Oil Type: SAE 20W-50 or 10W-30 (depending on climate and oil additive packages of the era). API SF or higher recommended if available and compatible. Coolant Type: Ethylene glycol-based antifreeze (e.g., Mercedes-Benz approved formula or equivalent) mixed with distilled water. Brake Fluid Type: DOT 3 or DOT 4 hydraulic brake fluid. Transmission Fluid Type: GL-4 Hypoid Gear Oil for manual transmission. Hydrak fluid specification for automatic transmission. Known Issues Common Wear Items: Carburetor wear, ignition points and condenser failure, brake shoe wear, kingpins and ball joints (if...