🏷️ Basic Information Identification Make: Mercedes-Benz Model: 180 Series (180a, 180b, 180c) Model Codes: W120 (180a, 180b, 180c) 👋 Introduction Market Position Market Position: Premium compact sedan and coupe of its era, targeting discerning buyers valuing quality engineering and understated luxury. Competitive Analysis Competitive Analysis: Competed with other European luxury brands like BMW and Alfa Romeo, as well as higher-end models from American manufacturers. Key differentiators were build quality, engineering robustness, and sophisticated design. Key Features Key Features: Monocoque construction, advanced (for its time) independent suspension, robust inline-four engine, excellent build quality, comfortable ride, durable. 📋 Manual Details Coverage Manual Type: Service Repair Workshop Manual Language: English Format: Digital (likely PDF, implied by availability for sale) 📖 Manual Coverage Systems Covered Engine: Complete overhaul, tune-up, diagnostics, lubrication, cooling system, fuel system (carburetor), ignition system, exhaust system Transmission: Manual transmission (4-speed), clutch, driveshaft, differential, axle shafts Brakes: Hydraulic drum brakes (front and rear), brake adjustments, linings, wheel cylinders, master cylinder, parking brake Suspension: Front independent suspension (double wishbone), rear solid axle with coil springs, shock absorbers, steering linkage Electrical: Wiring diagrams, battery, generator, starter motor, lighting system, instruments, ignition switch, fuse box Bodywork: Body panel repair, doors, windows, interior trim, seats, bumpers, chassis lubrication Procedures Included Maintenance: Routine servicing, oil changes, filter replacement, lubrication points, pre-delivery inspection Repair: Engine rebuild, transmission overhaul, brake relining, suspension component replacement, electrical component repair Troubleshooting: Diagnostic procedures for common starting, running, and electrical issues Technical Depth Depth: Comprehensive, suitable for professional mechanics and advanced DIY enthusiasts. Covers detailed disassembly, assembly, specifications, and adjustments. 📊 Manual Specifications File Format File Format: Likely PDF, Optimized for Searchability and Printing Print Quality: High Resolution Scans of Original Factory Manuals Searchability: Text-searchable for quick access to information Binding Type Binding Type: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-cylinder, Overhead Valve (OHV) Engine Displacement 180A 180B: 1767 cc Engine Displacement 180C: 1897 cc Bore Stroke 1767Cc: 82.0 mm x 85.0 mm Bore Stroke 1897Cc: 87.0 mm x 84.0 mm Compression Ratio 180A 180B: 6.8:1 Compression Ratio 180C: 7.0:1 Horsepower 180A: 55 PS (40 kW; 54 hp) at 4300 rpm Horsepower 180B: 60 PS (44 kW; 59 hp) at 4300 rpm Horsepower 180C: 65 PS (48 kW; 64 hp) at 4300 rpm Torque 180A: 10.6 kg⋅m (104 N⋅m; 76 lb⋅ft) at 2500 rpm Torque 180B: 10.7 kg⋅m (105 N⋅m; 77 lb⋅ft) at 2500 rpm Torque 180C: 11.8 kg⋅m (116 N⋅m; 85 lb⋅ft) at 2500 rpm Fuel System Fuel System: Single Solex Carburetor (model varies by engine variant) Fuel Type: Unleaded Gasoline (premium recommended, leaded gasoline was common for the era) Engine Components Engine Code: M120 (for 180a/b), M121 (for 180c) 🔧 Transmission Standard Transmission Type: 4-speed Manual Transmission Optional Optional Transmission: 3-speed Automatic (Optional on some later models) Features Clutch Type: Single dry plate, hydraulically operated Final Drive: Rear-wheel drive, Hypoid differential 📐 Dimensions Exterior Wheelbase: 2650 mm (104.3 inches) Length: 4470 mm (176.0 inches) Width: 1720 mm (67.7 inches) Height: 1590 mm (62.6 inches) Weights Curb Weight: Approximately 1200-1280 kg (2646-2822 lbs), varies by model and equipment Wheels Tires Wheel Size: 15 inch (standard) Tire Size: 6.40-15 or 7.00-15 (typical for the era) Bolt Pattern: 5 x 112 mm 🛡️ Safety Features Ratings Safety Ratings: Not directly applicable to the era of manufacture (modern crash testing standards did not exist). Active Features Active Features: Dual-circuit hydraulic braking system for improved reliability. Passive Features Passive Features: Reinforced passenger cell, safety steering column (collapsible design), laminated glass windshield. 💡 Technology Features Infotainment Infotainment System: Basic analog radio (optional) and heater controls. No modern infotainment features. Driver Assistance Driver Assistance: None by modern standards. Focus was on mechanical reliability and driver engagement. Connectivity Connectivity: None. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000 to 5,000 miles (4,000 to 8,000 km) or annually, depending on usage and oil quality. Refer to manual for exact specification. Lubrication Intervals: Chassis lubrication points every 3,000 miles (4,000 km) or annually. Critical for suspension and steering components. Tune Up Interval: Recommended every 10,000-15,000 miles (16,000-24,000 km), involving spark plugs, ignition timing, carburetor adjustment. Fluid Specifications Engine Oil Type: API SF/SG classification or equivalent (e.g., SAE 20W-50 or 10W-30 depending on climate). Refer to original manual for specific recommendations. Engine Oil Capacity: Approximately 4.5 liters (4.7 US quarts) with filter change. Coolant Type: Ethylene Glycol based antifreeze/coolant mixed with distilled water (50/50 ratio). Transmission Fluid: GL-4 Hypoid Gear Oil (e.g., SAE 80W-90). Manual recommends specific Mercedes-Benz approved fluids. Brake Fluid Type: DOT 3 or DOT 4 Hydraulic Brake Fluid. Known Issues Common Issues: Carburetor tuning and maintenance, points ignition system wear, brake system maintenance (especially rubber components), potential rust in common areas, aging electrical wiring, steering box wear. Maintenance Focus: Regular lubrication, careful adjustment of carburetor...