🏷️ Basic Information Identification Make: Audi Model: A4 Year: 1999 Codes Chassis Code: B5 👋 Introduction Market Position Segment: Compact Executive Sedan/Wagon Competitive Analysis Competitors: BMW 3 Series, Mercedes-Benz C-Class, Lexus IS, Acura TL Key Features Platform: Shared platform with Volkswagen Passat B5, known for its sophisticated independent suspension. Drivetrain Options: Available in Front-Wheel Drive (FWD) and Audi's renowned Quattro All-Wheel Drive (AWD). Design Language: Understated and elegant styling, a hallmark of Audi design from this era. Target Audience: Consumers seeking a premium European driving experience, refined interiors, and advanced safety features. 📋 Manual Details Coverage Areas General: Complete Service & Repair Page Count Estimated Pages: 1500+ Manual Type Type: Software Service & Repair Manual Language Language: English Format Format: Digital Software (likely searchable PDF or proprietary application) 📖 Manual Coverage Systems Covered Engine: All gasoline and diesel engine variants (1.6L, 1.8L, 1.9L TDI, 2.4L, 2.8L) Transmission: Manual & Automatic Transmissions (including Quattro AWD) Brakes: Hydraulic Brake System, ABS, Traction Control (ASR) Electrical: Complete Electrical System Schematics, Diagnostics, ECU, Sensors, Lighting, Power Accessories Suspension: Front McPherson Strut, Rear Independent Multi-link, Damping, Bushings Steering: Power Steering System, Steering Rack, Column Fuel: Fuel Injection Systems (MPI/GDI), Fuel Pump, Lines, Tank, Emissions Control Cooling: Radiator, Water Pump, Thermostat, Coolant Flow, Climate Control Exhaust: Exhaust Manifold, Catalytic Converter, Muffler, Oxygen Sensors Body: Body Panels, Doors, Locks, Windows, Mirrors, Body Sealing HVAC: Heating, Ventilation, Air Conditioning System Components and Diagnostics Procedures Included Maintenance: Scheduled Maintenance (oil changes, filter replacements, spark plugs), Fluid Level Checks, Inspections Troubleshooting: System-specific diagnostic flowcharts, common fault codes, symptom-based troubleshooting Repair: Component Replacement (e.g., timing belt, water pump, brake pads, CV joints), Engine Mechanical Repairs, Transmission Overhaul Diagnostics: On-Board Diagnostics (OBD-II) code retrieval and interpretation, sensor testing, actuator testing Adjustments: Wheel Alignment, Clutch Adjustment (if applicable), Headlight Aiming Installation: Component installation procedures (e.g., timing belt kit, brake rotors, starter motor) Technical Depth Depth: Comprehensive: From basic fluid changes to complete engine and transmission rebuilds, including electrical troubleshooting and bodywork. 📊 Manual Specifications File Format Compatibility: Windows OS (likely XP, Vista, 7, 8, 10 compatible) Print Quality Printability: Printable pages (subject to software features and user's printer) Binding Type Binding: N/A (Software) Paper Type Paper Quality: N/A (Digital) ⚙️ Engine Specifications Primary Engine 1.8L Turbo (1.8T): Inline-4, 20-valve DOHC, Turbocharged, Electronic Multi-Point Fuel Injection (MPI). Output: ~150 hp @ 5700 rpm, ~164 lb-ft torque @ 1950 rpm. Engine codes: AEB, ATW, AWM. 2.8L V6 (2.8): 60-degree V6, 30-valve DOHC, Multi-Point Fuel Injection (MPI). Output: ~190 hp @ 6000 rpm, ~200 lb-ft torque @ 3200 rpm. Engine codes: ACK, AML, APB. 1.9L Tdi: Inline-4, 8-valve SOHC, Turbocharged Direct Injection Diesel. Output: ~90 hp @ 4000 rpm, ~144 lb-ft torque @ 1900 rpm. Engine codes: AHU, AHH. Performance Acceleration 0 60 Mph 1.8T: Approx. 8.0-9.0 seconds (FWD/Quattro) Acceleration 0 60 Mph 2.8: Approx. 7.0-8.0 seconds (FWD/Quattro) Fuel System Fuel Type: Unleaded gasoline (91 octane recommended for 1.8T), Diesel fuel for TDI Emission Controls: Catalytic converter, Oxygen sensors (Lambda sensors), EVAP system 🔧 Transmission Standard Standard Transmission: 5-speed Manual Transmission (for most engine variants) Optional Optional Transmission: Tiptronic 5-speed Automatic Transmission (with manual shift mode) Features Quattro AWD: Torsen center differential for permanent all-wheel drive with biased torque distribution. Clutch Type: Hydraulically actuated single dry plate clutch (manual) Fluid Specifications Manual Trans Fluid: G 052 171 A2 (or equivalent GL-4 manual transmission fluid) Automatic Trans Fluid: G 055 025 A2 (or equivalent ATF for ZF 5HP19FL) 📐 Dimensions Exterior Length: 4516 mm (177.8 in) Width: 1765 mm (69.5 in) Height: 1419 mm (55.9 in) Wheelbase: 2606 mm (102.6 in) Cargo Trunk Volume Sedan: Approx. 455 Liters (16.1 cu ft) Weights Curb Weight 1.8T: Approx. 1420-1500 kg (3130-3307 lbs) Curb Weight 2.8: Approx. 1520-1590 kg (3351-3505 lbs) Gross Vehicle Weight Rating: Varies by configuration, typically around 2000-2100 kg (4409-4630 lbs) 🛡️ Safety Features Ratings NHTSA Front Impact: 4/5 stars (driver/passenger) for 1999 model year IIHS Side Impact: Not rated for this specific year and model, but generally performed well for its class. Active Features ABS: Standard Anti-lock Braking System (ABS) Traction Control: Optional/Standard depending on trim, Acceleration Slip Regulation (ASR) Passive Features Airbags: Driver and front passenger airbags, optional side airbags. Seatbelts: 3-point inertia-reel seatbelts with pretensioners and load limiters. Child Seat Anchors: ISOFIX (LATCH) anchor points in rear seats (standard in most markets). 💡 Technology Features Infotainment Audio System: Factory radio/cassette player or CD player, optional premium sound systems (e.g., Bose). Navigation: Optional factory navigation system available on some higher trims. Driver Assistance Cruise Control: Standard on most trims. Connectivity Onboard Diagnostics: OBD-II (On-Board Diagnostics II) compliant for emissions and system monitoring. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 10,000 miles or 1 year, whichever comes first. Consult manual for specific conditions. Timing Belt Replacement: Recommended every 60,000-100,000 miles or 5-7 years (depending...