🏷️ Basic Information Identification Make: Mercedes-Benz Model: 180, 190, 220 Model Aliases: Ponton Mercedes, W120, W121, W180, W122, W105 Codes Chassis Codes: W120, W121, W180, W122, W105 👋 Introduction Market Position Value Proposition: Provides comprehensive, official factory repair information in a convenient digital format, saving users money compared to traditional printed manuals and professional mechanic fees. Key Features Convenience: Digital format allows for quick access, easy searching, selective printing, and no risk of physical damage. Completeness: Hundreds of pages covering all aspects of vehicle repair and maintenance, 'ALL STYLES COVERED'. Detail Level: Step-by-step instructions, hundreds of photos and illustrations, complete disassembly detail. 📋 Manual Details Coverage Areas Vehicle Models Covered: Mercedes-Benz 180, 190, 220 series Body Styles Covered: Sedan, potentially others depending on specific sub-models within the 180/190/220 designation (e.g., potentially some wagon variants if applicable to these chassis codes) Page Count Estimated Page Count: Hundreds (exact number not specified, but implies comprehensive coverage) Manual Type Type: Factory Service Repair Manual (FSM) Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Service Repair: Full overhaul, diagnostics, component testing, rebuild procedures Transmission Service Repair: Manual and automatic transmission service, repair, and overhaul Brake System: Hydraulic system, components (master cylinder, wheel cylinders, calipers, drums), linings, bleeding, diagnostics Electrical System: Wiring diagrams, component testing, charging system, starting system, lighting, ignition, accessories Suspension: Front and rear suspension components, alignment, bushings, shocks/struts, springs Steering: Steering box, linkages, power steering (if applicable), diagnostics Cooling System: Radiator, water pump, thermostat, hoses, fan, coolant specifications, flush and fill procedures Fuel System: Carburetors or fuel injection (depending on specific models), fuel pump, lines, filters, tank, diagnostics Emission System: Components and operation related to emissions control for the applicable era Heater Air Conditioning: HVAC system components, operation, and servicing (likely focused on heating for this era) Chassis Body: Frame, body panels, doors, glass, chassis lubrication, corrosion protection Restraint System: Seat belts, potentially early airbag systems if applicable to specific later models covered Interior: Upholstery, trim, dashboard, controls, sound deadening Differential Drive: Rear axle assembly, differential service, lubrication, driveshaft Axle: Front and rear axle components, bearings, seals Procedures Included General Maintenance: Scheduled maintenance, fluid changes, filter replacements, lubrication Troubleshooting: Diagnostic charts, symptom-based troubleshooting, common fault diagnosis Engine Repair: Complete engine overhaul, timing adjustments, valve adjustments, component replacement Transmission Repair: Clutch service, transmission rebuild, gear replacement, fluid checks Brake Repair: Brake pad/shoe replacement, caliper/wheel cylinder rebuild, bleeding, adjustment Wiring Diagrams: Detailed electrical schematics for all vehicle systems Suspension Repair: Ball joint replacement, control arm bushings, shock absorber installation Steering Repair: Tie rod end replacement, steering box adjustment, power steering pump service Cooling System Repair: Radiator replacement, water pump seal replacement, thermostat housing service Fuel Injection Service: Injector testing, fuel pressure regulator service, diagnostic procedures for fuel injection systems Chassis Body Repair: Body panel alignment, door hinge service, chassis lubrication points and schedule Periodic Lubrication: Detailed lubrication points and schedule for chassis and drivetrain components Technical Depth Depth: Complete factory service and repair, covering everything from routine maintenance to full mechanical overhauls and diagnostics. Target Audience: Do-it-yourself enthusiasts and professional mechanics. 📊 Manual Specifications File Format Compatibility: All versions of Windows and Mac, accessible via web browser on any computer or mobile device. Required Software: Adobe PDF Reader, WinZip (free online). Print Quality Printability: Fully printable, allowing users to print entire manual or specific pages. Binding Type Binding: Digital (PDF format), implies no physical binding. Paper Type Paper Type: Not applicable for digital format, but implies high-quality content suitable for printing on standard paper. ⚙️ Engine Specifications Primary Engine Engine Types: Inline-4 cylinder (M136, M121), Inline-6 cylinder (M180, M102, M123) - Specific displacement varies by model designation (180, 190, 220). Performance Typical Horsepower Range: Approximately 50 HP to 120 HP depending on specific engine and model variant. Typical Torque Range: Varies significantly by engine, but generally in the range of 70 lb-ft to 150 lb-ft. Fuel System Fuel Delivery: Primarily carbureted for most models in this era, with some later variants or specific options potentially featuring early fuel injection systems (e.g., Bosch D-Jetronic). 🔧 Transmission Standard Standard Transmission Type: Typically a 4-speed manual transmission. Optional Optional Transmission Type: Optional automatic transmission (e.g., Mercedes-Benz 'Hydrak' or later automatic gearboxes) available on many models. Features Clutch Type: Single dry plate clutch for manual transmissions. 📐 Dimensions Exterior Wheelbase: Varies by specific model (e.g., W120/W121 ~2650mm, W180 ~2820mm). Overall Length: Varies by specific model, generally in the range of 4400mm - 4700mm. Weights Curb Weight: Typically ranges from approximately 1100 kg to 1400 kg depending on model and equipment. 🛡️ Safety Features Passive Features Seat Belts: Front seat belts standard, rear seat belts often optional or later additions. Body Structure: Unitary construction with reinforced safety cage typical of Mercedes-Benz engineering of the era. 💡 Technology Features Infotainment Audio System: Typically an AM/FM radio,...