🏷️ Basic Information Identification Make: Audi Model: A4 (B5 Chassis) Year: 1999 Codes Chassis Code: B5 Engine Codes Covered: AEB, ATW, AWM (1.8L Turbo), AHA, APB (2.8L V6) 👋 Introduction Market Position Segment: Compact Executive Sedan/Wagon Competitive Analysis Competitors: BMW 3 Series (E46), Mercedes-Benz C-Class (W202), Lexus IS (XE10), Volvo S40/V40 Key Features Platform Highlights: Audis first major foray into front-wheel drive and Haldex all-wheel drive (Quattro) in the compact executive segment, known for its refined interior and solid build quality. Target Audience: Discerning buyers seeking a balance of performance, comfort, and premium features, often DIY enthusiasts or those prioritizing long-term maintenance documentation. 📋 Manual Details Coverage Areas Coverage: Full Service, Maintenance, Troubleshooting, Repair, Diagnostics Page Count Estimated Page Count: 1500+ Manual Type Type: Professional Service and Repair Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, cylinder head, crankshaft, pistons, timing belt/chain, lubrication system, cooling system Engine Management: Fuel injection, ignition system, emissions control, ECU diagnostics, sensor data Transmission: Manual transmission (5-speed & 6-speed Quattro), Automatic transmission (Tiptronic - 4-speed), clutch, driveshafts, differentials Suspension: Front suspension (MacPherson strut), Rear suspension (multi-link), shocks, springs, control arms, bushings Brakes: Front and rear disc brakes, ABS system, hydraulic lines, master cylinder, brake pads and rotors Steering: Power steering system, steering rack, tie rods, steering column Electrical System: Battery, charging system, starter motor, lighting, fuses, relays, wiring diagrams, instrument cluster Body And Chassis: Body panels, doors, hood, trunk, bumpers, interior trim, chassis components HVAC: Heating, ventilation, air conditioning system, compressor, refrigerant, climate control modules Procedures Included Maintenance: Oil changes, filter replacements (oil, air, fuel, cabin), spark plug replacement, fluid checks and changes (coolant, brake fluid, power steering fluid, transmission fluid) Repair: Engine overhaul, transmission rebuild, suspension component replacement, brake service, electrical component repair, bodywork repair Troubleshooting: Diagnostic fault codes (DTCs), common drivability issues, electrical gremlins, performance problems Diagnostics: OBD-II diagnostics, scan tool usage, live data interpretation, sensor testing Technical Depth Depth: Comprehensive from basic maintenance to complete engine and transmission rebuilds, including detailed wiring diagrams and diagnostic procedures. 📊 Manual Specifications File Format File Type: Searchable PDF Print Quality: High-resolution, printable pages Binding Type Binding Format: Digital download (not applicable for print) Paper Type Paper Format: Digital (not applicable for print) ⚙️ Engine Specifications Primary Engine 1.8T Engine Variant: 1.8L DOHC 20-valve turbocharged inline-4 (AEB, ATW, AWM) 1.8T Horsepower: 150 hp @ 5700 rpm 1.8T Torque: 155 lb-ft @ 1950-5000 rpm (162 lb-ft with ATW/AWM) 2.8L V6 Engine Variant: 2.8L DOHC 30-valve V6 (AHA, APB) 2.8L V6 Horsepower: 190 hp @ 6000 rpm 2.8L V6 Torque: 207 lb-ft @ 3200 rpm Performance 0 60 Mph 1.8T FWD: Approx. 8.7 seconds 0 60 Mph 1.8T Quattro: Approx. 8.1 seconds 0 60 Mph 2.8 Quattro: Approx. 7.0 seconds Fuel System Fuel Delivery 1.8T: Multi-point fuel injection (MPI), Bosch Motronic ECU Fuel Delivery 2.8: Multi-point fuel injection (MPI), Bosch Motronic ECU Recommended Fuel: Premium Unleaded Gasoline (91 octane or higher) 🔧 Transmission Standard Standard Transmission: 5-speed Manual (FWD and Quattro) Optional Optional Transmission: 4-speed Automatic with Tiptronic (FWD and Quattro) Features AWD System: Torsen center differential (Quattro models) Manual Transmission Fluid Spec: G 052 171 A2 (or equivalent API GL-4, SAE 75W-90 synthetic) Automatic Transmission Fluid Spec: G 052 162 A1 (or equivalent ATF, e.g., Dexron III/Mercon) 📐 Dimensions Exterior Length: Sedan: 177.7 in (4513 mm) / Avant: 180.5 in (4585 mm) Width: 69.4 in (1763 mm) Height: Sedan: 55.4 in (1407 mm) / Avant: 55.0 in (1397 mm) Wheelbase: 103.2 in (2621 mm) Weights Curb Weight 1.8T FWD: Approx. 3000 lbs (1360 kg) Curb Weight 1.8T Quattro: Approx. 3150 lbs (1430 kg) Curb Weight 2.8 Quattro: Approx. 3400 lbs (1540 kg) Cargo Cargo Volume Sedan: 13.7 cu ft (388 L) Cargo Volume Avant: 36.5 cu ft (1033 L) / 65.0 cu ft (1841 L) with rear seats folded 🛡️ Safety Features Ratings NHTSA Front Impact: 4/5 Stars (Driver/Passenger) IIHS Side Impact: Good (for models equipped with side airbags) Active Features ABS: Standard on all models Traction Control: Standard on Quattro models (ASR) Passive Features Airbags: Front airbags (driver and passenger), Optional front side airbags Seatbelts: Three-point inertia-reel seatbelts with pretensioners and load limiters 💡 Technology Features Infotainment Audio System: Factory Audi Symphony or Concert audio systems, optional CD changer Navigation: Optional Audi Navigation System (non-color, screen-based) Driver Assistance Cruise Control: Standard on most models Connectivity Cellular Integration: Optional cellular telephone preparation with hands-free system (early implementation) 🔧 Maintenance Service Intervals Oil Change Interval: 7,500 miles (12,000 km) or 12 months, whichever comes first Timing Belt Replacement 1.8T: Every 70,000 - 90,000 miles (110,000 - 145,000 km) or 5-7 years Timing Belt Replacement 2.8 V6: Every 70,000 - 90,000 miles (110,000 - 145,000 km) or 5-7 years Spark Plug Replacement 1.8T: Approx. 60,000 miles (97,000 km) Spark Plug...