🏷️ Basic Information Identification Make: Mercedes-Benz Model: A-Class Model Code: W168 Variant: A190 Model Years Covered: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Codes Engine Code Primary: M166.990 Chassis Code: W168 👋 Introduction Market Position Segment: Compact Executive Hatchback Positioning: The W168 A-Class represented Mercedes-Benz's entry into the premium compact segment, designed to offer Mercedes-Benz quality, safety, and innovation in a smaller, more accessible package. It was known for its innovative 'sandwich' floor concept for enhanced safety and interior space utilization. Competitive Analysis Key Competitors: BMW 3 Series Compact (E36/5), Audi A3 (8L), Volkswagen Golf (Mk4), Ford Focus. Key Features Unique Selling Points: Sandwich floor design for safety and packaging, innovative compact powertrain, Mercedes-Benz build quality and brand prestige, advanced safety features for its class. 📋 Manual Details Coverage Areas Manual Type: Workshop Repair Service Manual Language: English Format: PDF Download Page Count Estimate: Approximately 2000+ pages (typical for comprehensive Mercedes workshop manuals) Digital Searchability: Yes, text-searchable PDF 📖 Manual Coverage Systems Covered Engine: Complete overhaul, tuning, diagnosis, cooling system, lubrication system, fuel system (injection, pump, filters), emission control systems (catalytic converter, O2 sensors), ignition system (coils, plugs, sensors), engine management (ECU). Transmission: Automatic transmission (type 722.6 '5G-Tronic' likely for A190), clutch, torque converter, gear shift mechanism, transmission control module, fluid and filter replacement, rebuilding procedures. Brakes: Front and rear disc brakes, ABS (Anti-lock Braking System), ESP (Electronic Stability Program), brake lines, master cylinder, brake booster, parking brake, hydraulic system. Suspension Steering: Front and rear suspension components (struts, springs, control arms, bushings), power steering system, steering rack, steering column, wheel alignment specifications. Electrical Electronics: Complete wiring diagrams, lighting systems, starting and charging systems (alternator, starter), battery, instrument cluster, interior and exterior lighting, body control modules, fuse box layouts, diagnostic connector (OBD-II). Bodywork Chassis: Body panel removal and installation, door mechanisms, hood, trunk, bumpers, glass replacement, interior trim, chassis structural components, rust prevention and repair. HVAC: Heating, Ventilation, and Air Conditioning (HVAC) system components, refrigerant system service, blower motor, climate control unit, cabin air filter. Infotainment Comfort: Radio, navigation system, speaker installation, climate controls, power windows, central locking, seat adjustments. Procedures Included Maintenance: Scheduled maintenance intervals, oil change procedures and fluid specifications, filter replacements (oil, air, fuel, cabin), spark plug replacement, brake fluid flush, coolant change. Diagnostics: Troubleshooting guides, symptom-based diagnostics, fault code interpretation, diagnostic tool usage (e.g., STAR diagnostic system principles). Repair Rebuild: Step-by-step instructions for component removal, installation, and rebuilding of major mechanical and electrical systems. Technical Specifications: Torque values for all fasteners, clearances, tolerances, wiring diagrams, vacuum routing, component identification. Safety Systems: Airbag system service precautions, SRS (Supplemental Restraint System) component replacement, seatbelt inspection. Emissions Control Service: Detailed procedures for diagnosis and repair of emission control components, including exhaust gas recirculation (EGR) if applicable, catalytic converter checks, and evaporative emission control (EVAP) systems. Technical Depth Depth: Comprehensive coverage suitable for professional mechanics and advanced DIY enthusiasts. Includes detailed diagrams, exploded views, and precise specifications for repair and overhaul. Manual Usefulness Target Audience: Professional Mercedes-Benz technicians, independent repair shops, and knowledgeable DIY enthusiasts seeking in-depth repair information. Diagnostic Tools Mention: Likely references or assumes knowledge of diagnostic tools like the Mercedes-Benz 'STAR' diagnostic system or equivalent OBD-II scanners for electronic troubleshooting. 📊 Manual Specifications File Format File Type: PDF Print Quality: High-resolution, suitable for printing individual sections or the entire manual. Searchability: Text-searchable, allowing for quick retrieval of information using keywords. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) Manual Completeness Completeness: Comprehensive workshop manual covering all aspects of maintenance, repair, troubleshooting, and diagnostics for the specified W168 A190 models. ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-cylinder, naturally aspirated Displacement: 1.9 Liters (1898 cc) Bore X Stroke: 82.0 mm x 93.7 mm Compression Ratio: 10.0:1 Valve Train: SOHC (Single Overhead Camshaft), 2 valves per cylinder Performance Horsepower: 125 hp (92 kW) @ 5500 rpm Torque: 180 Nm (133 lb-ft) @ 3600 rpm Fuel System Fuel Delivery: Electronic Fuel Injection (Bosch Motronic M5.9 or similar) Fuel Type: Unleaded Gasoline (RON 95 recommended) Fluid Specifications Engine Oil Type: API SL or ACEA A3/B3, SAE 0W-30 or 0W-40 (or as specified by Mercedes-Benz) Engine Oil Capacity: Approx. 5.0 Liters (with filter) Coolant Type: Mercedes-Benz approved Antifreeze/Coolant (Glysantin G48 or equivalent), 50/50 mix 🔧 Transmission Standard Transmission Type: 5-speed Automatic (likely 722.6 5G-Tronic) Optional Manual Transmission Option: Not typically available for A190; primarily automatic. Features Transmission Control: Electronic control with multiple modes (e.g., Comfort, Sport - depending on ECU). Fluid Specifications Transmission Fluid Type: MB 236.10 (e.g., ATF Dexron III or equivalent, check specific model VIN for exact spec) Transmission Fluid Capacity: Approx. 7.0 - 8.0 Liters (for total fill, including torque converter) 📐 Dimensions Exterior Length: Approx. 3626 mm (early models) to 3776 mm (later facelift) Width: Approx. 1719 mm Height: Approx. 1593 mm...