🏷️ Basic Information Identification Make: Mercedes-Benz Model: 220a, 220S, 220SE Product Name: Mercedes 220a 220S 220SE Factory Service Repair Manual Codes Chassis Codes: W180 (220a, 220S), W128 (220SE) 👋 Introduction Market Position Class: Executive/Luxury Sedan Era: Mid-1950s Post-War Automotive Luxury Competitive Analysis Competitors: Rolls-Royce Silver Cloud, Bentley S-Series, Cadillac Fleetwood, Jaguar Mark IX Key Features Design Philosophy: Robust engineering, luxurious appointments, advanced (for the era) technology Prestige: Symbol of post-war German economic recovery and engineering prowess 📋 Manual Details Coverage Areas Model Years Covered: Primarily 1954-1959 (exact range may vary by specific manual variant) Chassis Variants Covered: W180 (220a, 220S), W128 (220SE) Page Count Estimated Page Count: Hundreds (exact count not specified but typical for factory manuals) Manual Type Type: Factory Service Repair Manual Language Language: English (assumed, typical for widely distributed service manuals; original may be German) Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Engine: M180 (2.2L inline-6) and M127 (2.2L inline-6, fuel-injected) Transmission: Manual (4-speed, synchromesh), Automatic (optional, Hydro-Stick/Hydrak) Drivetrain: Rear-wheel drive, driveshaft, differential, axles Suspension: Independent front suspension (double wishbone), swing axle rear suspension Brakes: Drum brakes (front and rear), potential for early front disc brakes on some SE models Steering: Recirculating ball steering system Fuel System: Carburetor (220a, 220S), Bosch mechanical fuel injection (220SE) Electrical System: Ignition system, lighting, battery, generator/alternator, starter Cooling System: Radiator, water pump, thermostat, hoses Exhaust System: Manifolds, pipes, mufflers Body And Chassis: Frame, body panels, doors, glass, interior trim Heating And Ventilation: HVAC system components Procedures Included Routine Maintenance: Oil changes, filter replacements, tune-ups, lubrication Engine Overhaul: Engine disassembly, inspection, repair, and reassembly procedures Transmission Repair: Manual and automatic transmission service and repair Brake System Service: Brake pad/shoe replacement, drum machining, hydraulic system bleeding Electrical Diagnostics: Troubleshooting wiring diagrams, component testing Fuel Injection System Service: Bosch injection pump calibration and repair (for 220SE) Suspension And Steering Repair: Component replacement, alignment procedures Bodywork And Trim: Panel alignment, trim installation, glass replacement Troubleshooting Guides: Systematic fault finding and resolution steps Torque Specifications: Tightening torques for critical fasteners Wiring Diagrams: Complete electrical schematics Technical Depth Depth: Comprehensive factory-level detail, suitable for professional mechanics and dedicated enthusiasts Diagnostic Capability: Advanced diagnostics for all major systems Manual Completeness Completeness: Official Factory Service Repair Manual, intended to be exhaustive 📊 Manual Specifications File Format Format: PDF (Portable Document Format) Print Quality Print Quality: Printable in its entirety or selected pages, suggesting high resolution Binding Type Binding Type: N/A (Digital PDF format) Paper Type Paper Type: N/A (Digital PDF format) ⚙️ Engine Specifications Primary Engine Engine Family: M180 / M127 Inline-6 Displacement: 2195 cc (2.2 Liters) Bore X Stroke: 82 mm x 85 mm Compression Ratio: Approx. 7.5:1 to 8.0:1 (varies by model) Performance Horsepower 220A 220S: Approx. 100-105 hp (SAE gross) at 4800 rpm Horsepower 220Se: Approx. 115-120 hp (SAE gross) at 4800 rpm Torque 220A 220S: Approx. 170 Nm (125 lb-ft) at 2500 rpm (carbureted) Torque 220Se: Approx. 185 Nm (136 lb-ft) at 3000 rpm (fuel injected) Fuel System Fuel System 220A 220S: Dual Solex 34 PCI Carburetors Fuel System 220Se: Bosch MW Injection Pump, single injector per cylinder Fuel Type: Premium Unleaded Gasoline (minimum 91 octane recommended for modern fuel) Engine Layout Layout: Inline 6-cylinder, Front-mounted, Longitudinal Engine Cooling Cooling Type: Water-cooled Engine Lubrication Oil Capacity: Approx. 5.5 Liters (5.8 US quarts) with filter Recommended Oil Viscosity: SAE 10W-30 or 10W-40 (consult original manual for specific vintage grades or modern equivalents) 🔧 Transmission Standard Type Standard: 4-speed Manual Synchromesh Optional Type Optional: Mercedes-Benz Hydrak (Automated Clutch System) or early Hydromatic Features Clutch Type: Single dry plate (manual); automated clutch actuation (Hydrak) Transmission Fluid Fluid Type Manual: API GL-4 Hypoid Gear Oil (SAE 90) Fluid Type Automatic: Dexron III/Mercon or equivalent (for Hydrak/Hydromatic) 📐 Dimensions Exterior Length: Approx. 4780 mm (188.2 in) Width: Approx. 1770 mm (69.7 in) Height: Approx. 1500-1540 mm (59.1-60.6 in) Wheelbase: Approx. 2875 mm (113.2 in) Weights Curb Weight: Approx. 1350-1450 kg (2976-3197 lbs) Gross Vehicle Weight Rating: Varies by specific model and configuration Wheels And Tires Wheel Size: 15-inch wheels common Tire Size Typical: 6.40-15 or 6.70-15 (bias ply); radial equivalents may differ Bolt Pattern: 5 x 112 mm 🛡️ Safety Features Ratings Crash Test Data: Not available for this era by modern standards Active Features Braking System: Hydraulically operated drum brakes, dual circuit system Steering System: Recirculating ball, though power steering was not standard initially Passive Features Seat Belts: Optional, not standard equipment during initial production Construction: Unitized body construction (Ponton design), offering improved safety over body-on-frame 💡 Technology Features Infotainment Radio: Optional period-correct AM/FM radio, often with push-button tuning Speakers: Typically one or two speakers Driver Assistance Power Steering: Optional on some models, not standard Brakes: Hydraulic drum brakes with dual circuit system for safety redundancy Connectivity Connectivity Features: N/A by modern standards; focus is on mechanical...