🏷️ Basic Information Identification Make: Audi Model: 100 Year: 1991 Codes Chassis Code: C3 👋 Introduction Market Position Segment: Executive Sedan / Mid-size Luxury Car Competitive Analysis Key Competitors: BMW 5 Series, Mercedes-Benz E-Class, Volvo 740/760 Key Features Aerodynamics: Pioneering Aerodynamic Design Quattro AWD: Available Quattro All-Wheel Drive Build Quality: German Engineering and Build Quality 📋 Manual Details Coverage Areas Engine: 2.3E (5-cylinder) Transmission: Manual and Automatic Drivetrain: Front-Wheel Drive (FWD) and Quattro All-Wheel Drive (AWD) Page Count Estimated Pages: Approximately 1000-1500 pages (typical for comprehensive factory manuals of this era) Manual Type Type: Service and Repair Manual Language Language: English Format Format: Software (Digital) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete Fuel System: Complete Ignition System: Complete Cooling System: Complete Exhaust System: Complete Transmission Manual: Complete Transmission Automatic: Complete Drivetrain AWD Quattro: Comprehensive Suspension: Complete Steering: Complete Brakes: Complete Electrical System: Comprehensive Climate Control: Complete Body And Interior: Comprehensive Procedures Included Scheduled Maintenance: Detailed Troubleshooting: Extensive Repair Procedures: Step-by-Step Overhaul Procedures: Comprehensive Technical Specifications: Detailed Wiring Diagrams: Included Technical Depth Depth: Factory Level / Professional 📊 Manual Specifications File Format Digital Format: Proprietary Software / Searchable PDF Print Quality Image Resolution: High Resolution Binding Type Binding: N/A (Digital Software) Paper Type Paper Quality: N/A (Digital Software) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 5-Cylinder Engine Code: NG Performance Horsepower: 130 hp @ 5600 rpm Torque: 137 lb-ft @ 3200 rpm Fuel System Injection System: Bosch Motronic Fuel Type: Unleaded Gasoline Engine Mechanical Bore X Stroke: 76.5 mm x 100 mm Compression Ratio: 10.1:1 🔧 Transmission Standard Type: 5-Speed Manual Optional Type: 4-Speed Automatic Features Quattro Integration: Available with Quattro 📐 Dimensions Exterior Length: 192.2 inches Width: 70.1 inches Height: 56.3 inches Wheelbase: 104.7 inches Weights Curb Weight: 3175-3400 lbs (approximate, depending on drivetrain) Gross Vehicle Weight Rating: Approx. 4300 lbs 🛡️ Safety Features Ratings NHTSA Ratings: Not extensively rated by modern standards Active Features ABS: Available Traction Control: Not typical for this model year Passive Features Airbags: Driver-side airbag (optional/standard on some trims) Seat Belts: Front and Rear Body Structure: Reinforced Safety Cage 💡 Technology Features Infotainment Audio System: Factory AM/FM Stereo Cassette Climate Control: Manual or Optional Automatic Climate Control Driver Assistance Cruise Control: Standard or Optional Connectivity Connectivity Features: Basic 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-5,000 miles or 6-12 months Timing Belt Replacement: Every 40,000-60,000 miles or 4-5 years Spark Plug Replacement: Every 30,000-40,000 miles Fluid Specifications Engine Oil Type: SAE 5W-30 or 5W-40 (API SG or higher) Engine Oil Capacity: Approximately 4.5 liters (with filter) Coolant Type: Ethylene Glycol based antifreeze (Audi/VW G11 spec) Brake Fluid Type: DOT 3 or DOT 4 Automatic Transmission Fluid: ATF G 005 (Dexron II/III compatible) Manual Transmission Fluid: G 052 171 (API GL-4, SAE 75W-90) Known Issues Heater Core Leaks: Common failure point Window Regulator Failure: Common failure point ABS Sensor Failure: Can occur Fuel Pump Reliability: Variable 📚 Vehicle History Brand Heritage Audi Legacy: Ingolstadt, Germany Model Evolution C3 Generation: 1982-1991 Production Manufacturing Location: Ingolstadt, Germany Market Introduction: Launched in late 1982 as a 1983 model year 🏆 Awards & Recognition Recognitions Design Awards: Car and Driver's 10Best (1986) Ratings Aerodynamic Efficiency: Class-leading for its time