🏷️ Basic Information Identification Make: Audi Model: A4 Quattro Year: 2004 Generation Generation Code: B6 Codes Chassis Code: 8E/8H 👋 Introduction Market Position Positioning: A premium compact executive car, competing with models like the BMW 3 Series and Mercedes-Benz C-Class. Competitive Analysis Competitors: BMW 3 Series (E46), Mercedes-Benz C-Class (W203), Lexus IS Key Features Distinctive Features: Standard Quattro all-wheel-drive system, sophisticated interior design, refined ride and handling. Manual Advantage: Provides factory-licensed OE (Original Equipment) derived information for accurate and reliable repairs. 📋 Manual Details Coverage Areas Primary Coverage: Service and Repair Diagnostic Coverage: Extensive diagnostic procedures and fault code interpretation Maintenance Coverage: Scheduled maintenance, fluid changes, filter replacements Repair Coverage: Component-level repair, system overhauls, specific part replacements Electrical Coverage: Wiring diagrams, component testing, electrical system troubleshooting Body Coverage: Body panel removal/installation, trim components, interior fixtures Page Count Estimated Pages: Thousands (as it's software-based and dynamically loads information) Manual Type Type: Online Service and Repair Manual Software Language Language: English Format Format: Web-based access (PC, laptop, smartphone, tablet compatible) 📖 Manual Coverage Systems Covered Engine: Engine mechanical, lubrication, cooling, fuel, ignition, emissions control, timing belt/chain Drivetrain: Manual and Automatic Transmissions, Quattro All-Wheel Drive System, Clutch, Drive Shafts, Differentials Suspension: Front and Rear Suspension, Springs, Dampers, Control Arms, Bushings, Wheel Bearings Steering: Power Steering System, Steering Rack, Tie Rods, Steering Column Brakes: Brake System Hydraulics, ABS, ESP, Brake Calipers, Rotors, Pads, Lines, Parking Brake Electrical Systems: Battery, Charging System, Starting System, Lighting, Fuses, Relays, ECU's, Sensors, Wiring Harnesses Climate Control: HVAC System, Air Conditioning, Heater Core, Blower Motor, Controls Body And Interior: Doors, Windows, Seats, Dashboard, Trim Panels, Exterior Body Panels, Bumpers Procedures Included Maintenance Procedures: Oil and Filter Changes, Coolant Flush, Spark Plug Replacement, Brake Fluid Flush, Air Filter Replacement, Cabin Air Filter Replacement Repair Procedures: Engine Rebuild Steps, Transmission Overhaul, Suspension Component Replacement, Brake Pad/Rotor Replacement, Clutch Replacement, Timing Belt/Chain Service Diagnostic Procedures: Troubleshooting common symptoms, testing electrical components, checking fluid levels and conditions, reading diagnostic trouble codes (DTCs) Installation Procedures: Installation guides for various components and accessories Technical Depth Depth: Comprehensive: From basic maintenance to in-depth diagnostics and complete system overhauls, including factory-level repair procedures. 📊 Manual Specifications File Format Access Method: Web Browser Access Print Quality Display Quality: High-resolution text and diagrams, zoomable for clarity. Binding Type Binding: N/A (Digital Access) Paper Type Paper Type: N/A (Digital Access) ⚙️ Engine Specifications Primary Engine Engine Variant: 2.0L Turbocharged Inline-4 (BFC, BKG) Engine Displacement: 1984 cc Engine Code Examples: BFC (130 kW/177 PS), BKG (147 kW/200 PS) Performance Horsepower: 177-200 hp (depending on specific engine variant) Torque: 210-280 Nm (depending on specific engine variant) Fuel System Fuel Type: Unleaded Petrol (Premium Recommended) Injection System: Multi-Point Fuel Injection (MPI) or Fuel Stratified Injection (FSI) Engine Management ECU Type: Bosch Motronic or Simos (specific model dependent) 🔧 Transmission Standard Transmission Type: 6-Speed Manual Optional Transmission Type: 6-Speed Tiptronic Automatic (with paddle shifters or selector lever control) Features Drivetrain: Quattro Permanent All-Wheel Drive 📐 Dimensions Exterior Length: 4574 mm (179.9 in) Width: 1766 mm (69.5 in) Height: 1421 mm (55.9 in) Wheelbase: 2640 mm (103.9 in) Weights Curb Weight: Approx. 1550-1600 kg (depending on configuration) 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star IIHS Front Impact: Good Active Features Electronic Stability Control: Standard (ESP) Traction Control: Standard (ASR) Anti Lock Brakes: Standard (ABS) Passive Features Airbags: Front, Side, and Optional Curtain Airbags Seatbelts: Pretensioning front seatbelts with load limiters 💡 Technology Features Infotainment Infotainment System: Audi Navigation Plus system with CD player and optional satellite radio. Driver Assistance Lighting Options: Optional Xenon Plus headlights with LED daytime running lights. Connectivity Auxiliary Input: Optional AUX input or CD changer for audio. 🔧 Maintenance Service Intervals Oil Change Interval: Every 10,000 miles or 1 year (whichever comes first), using synthetic oil. Timing Belt Interval: N/A (The 2.0 TFSI engine uses a timing chain, but earlier 1.8T models in other markets had belts. This manual likely covers the common 2.0L TFSI which has a chain.) Spark Plug Interval: Every 40,000-60,000 miles (depending on plug type). Fluid Specifications Engine Oil Type: SAE 5W-40 or 0W-40 Synthetic Oil, meeting VW 502 00 specification. Coolant Type: G12 Plus (or equivalent purple/pink coolant), 50/50 mix with distilled water. Brake Fluid Type: DOT 4 (or DOT 4 LV if specified for ABS/ESP systems) Transmission Fluid Manual: GL-4 or GL-5 Gear Oil (specific viscosity to be confirmed in manual). Transmission Fluid Automatic: G 052 162 A1 (or equivalent ATF for 6-speed Tiptronic, refer to manual for exact spec). Known Issues Common Problems: PCV (Positive Crankcase Ventilation) system failures, ignition coil failures, oil consumption in some engines, potential ABS/ESP sensor issues, water pump leaks, interior electrical gremlins. 📚 Vehicle History Brand Heritage Heritage: Audi AG, a German manufacturer of automobiles, known for its advanced engineering and quattro all-wheel-drive technology. Model Evolution Generation Context:...