🏷️ Basic Information Identification Make: Audi Model: 100 Model Generation: C3 Model Code: 447 (Sedan), 447 (Avant) Codes Production Years Covered: 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991 👋 Introduction Market Position Segment: Executive Sedan/Wagon Positioning: Premium European vehicle known for advanced engineering, aerodynamics, and comfort. Competitive Analysis Key Competitors: BMW 5 Series, Mercedes-Benz E-Class, Volvo 700 Series, Saab 9000, Ford Scorpio. Key Features Aerodynamics: Revolutionary drag coefficient (Cd) for its era, contributing to fuel efficiency and high-speed stability. Quattro: Availability of the groundbreaking Quattro all-wheel-drive system, enhancing traction and handling. Interior Comfort: Spacious and well-appointed interior, high-quality materials, ergonomic design. Safety Innovations: Introduction of Procon-ten (pre-tensioned seatbelts via airbag inflation) in later models. 📋 Manual Details Coverage Areas Primary Coverage: North America, Europe Secondary Coverage: Global markets (with regional variations noted) Page Count Estimated Page Count: 1500+ Manual Type Type: Comprehensive Service & Repair Workshop Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine overhaul, cylinder head, block, crankshaft, pistons, connecting rods, timing system (belts/chains), lubrication, cooling. Engine Management: Fuel injection systems (K-Jetronic, KE-Jetronic, Digifant), ignition systems, emissions control, sensors, actuators, ECU diagnosis. Transmission Manual: Clutch, gearbox overhaul, shift linkage, internal components, fluid specifications. Transmission Automatic: Torque converter, gearbox overhaul, valve body, control systems, fluid specifications, cooling. Drivetrain: Front-wheel drive axle shafts, CV joints, differentials, Quattro all-wheel drive system (if applicable to specific models covered). Suspension: Front suspension (MacPherson struts, control arms), rear suspension (independent trailing arms/beam axle depending on model), shock absorbers, springs, bushings, wheel alignment specifications. Steering: Power steering system, steering rack, pump, hoses, steering column, alignment. Brakes: Hydraulic system, brake master cylinder, calipers, pads, rotors, rear drums/discs, parking brake, ABS (if equipped), bleeding procedures, specifications. Electrical System: Battery, charging system (alternator, regulator), starting system (starter motor), lighting, fuses, relays, wiring diagrams for all systems. Body And Interior: Body panel removal/installation, door mechanisms, upholstery, dashboard, HVAC system, glass replacement, seals. Heating Ventilation Air Conditioning: HVAC system diagnosis, refrigerant, components (compressor, evaporator, condenser), blower motor, controls. Safety Systems: Seat belts, airbag systems (if equipped), general safety component checks. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt tensioning. Troubleshooting: Systematic diagnostic procedures, common faults and their causes, symptom-based troubleshooting guides. Repair: Step-by-step repair instructions for all major components and systems, including engine rebuilds, transmission swaps, brake system overhauls. Diagnosis: Methods for diagnosing electrical faults, engine performance issues, transmission problems, and other mechanical failures. Technical Specifications: Torque values, clearances, fluid capacities, wiring diagrams, component data. Technical Depth Depth: Comprehensive, covering routine maintenance to complete engine and transmission rebuilds, including detailed diagnostic procedures and wiring schematics. 📊 Manual Specifications File Format Digital Format: Searchable PDF Print Quality Image Resolution: High-resolution scans of original factory documentation Binding Type Physical Binding: N/A (Digital Format) Paper Type Physical Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Options: Inline-5 cylinder petrol engines, V6 petrol engines, Turbocharged variants, Diesel engines (some markets). Common Engine Codes: WX, WT (2.2L Turbo I5), NP, NG, NF, NC, AAN (2.3L I5), PM (2.0L I4 diesel), AA, RT, 3B (2.6L V6, 2.8L V6). Performance Horsepower Range: 80 hp (diesel) to 220 hp (20V Turbo) Torque Range: 130 Nm to 350 Nm (Turbo) Fuel System Fuel Delivery: Mechanical Fuel Injection (K-Jetronic), Electronic Fuel Injection (KE-Jetronic, Digifant). Fuel Type: Unleaded Petrol (Octane rating as per manual), Diesel Engine Build Cylinder Arrangement: Inline-5, V6 Displacement Range: 1.9L to 2.8L 🔧 Transmission Standard Transmission Type Standard: 5-speed Manual Transmission Optional Transmission Type Optional: 4-speed Automatic Transmission (ZF 4HP22) Features AWD Option: Quattro permanent all-wheel-drive system available on many models. 📐 Dimensions Exterior Body Styles: 4-door Sedan, 5-door Avant (Wagon) Length: Approx. 4750 mm (Sedan), 4770 mm (Avant) Width: Approx. 1770 mm Height: Approx. 1420 mm (Sedan), 1450 mm (Avant) Weights Curb Weight Range: 1300 kg - 1600 kg 🛡️ Safety Features Ratings Era Safety Standards: Designed to meet contemporary European safety standards, with incremental improvements throughout the generation. Active Features Active Safety: Anti-lock Braking System (ABS) optional on some models, Quattro AWD for enhanced stability. Passive Features Passive Safety: Front and rear crumple zones, reinforced passenger cell, standard seat belts, optional Procon-ten system. 💡 Technology Features Infotainment Audio Systems: Factory installed radios with cassette players, optional CD players on later models. Basic speaker systems. Driver Assistance Driver Aid Features: ABS (optional), cruise control (optional). Connectivity Connectivity Features: Limited to basic antenna connectivity for radio. No modern digital connectivity. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 10,000-15,000 km or 12 months, whichever comes first (refer to specific model year in manual). Timing Belt Replacement: Recommended every 60,000-100,000 km or 5-7 years for petrol engines, critical for engine longevity. Fluid Specifications Engine Oil: Refer to manual for specific viscosity (e.g., 5W-40, 10W-40, 15W-50) and...