🏷️ Basic Information Identification Make: Audi Model: S6 Year: 2003 Generation Generation Code: C5 (Typ 4B) Codes Chassis Code: 4B2 (Sedan), 4B5 (Avant) 👋 Introduction Market Position Vehicle Segment: Luxury Performance Sedan/Wagon Competitive Analysis Key Competitors 2003: BMW 540i, Mercedes-Benz E500, Lexus GS430 Key Features Vehicle Attributes: Powerful V8 engine, Quattro all-wheel drive, luxurious interior, high-performance tuning Manual Value Proposition: Officially licensed, OE-derived data, comprehensive coverage, convenient online access 📋 Manual Details Coverage Areas Engine Coverage: 4.2L V8 (BAS, BBD) Transmission Coverage: 5-speed Tiptronic Automatic (FZV) Body Styles Covered: Sedan, Avant (Wagon) Page Count Estimated Page Count: Over 2000 pages (typical for OE-derived software) Manual Type Manual Classification: Factory Service Manual (FSM) / Repair Manual Software Language Primary Language: English Format Delivery Format: Online Software (Web-based Access) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, cylinder head, crankshaft, pistons, connecting rods, timing system, lubrication, cooling system Engine Management: Fuel injection, ignition system, emissions control, engine control module (ECM) diagnostics, sensors, actuators Transmission And Drivetrain: Tiptronic automatic transmission, torque converter, differential, driveshafts, axles, AWD system (Quattro) Suspension: Front and rear suspension components, shock absorbers, springs, control arms, anti-roll bars, wheel bearings Steering: Power steering system, steering rack, steering column, tie rods Brakes: Front and rear brake systems, ABS (Anti-lock Braking System), EBD (Electronic Brake-force Distribution), brake calipers, rotors, lines, master cylinder, hydraulic system Electrical System: Battery, charging system, starter, lighting (headlights, taillights, interior), fuses, relays, wiring diagrams, body control modules HVAC: Heating, ventilation, air conditioning system, climate control, compressor, refrigerant, actuators Body And Chassis: Body panels, doors, hood, trunk, bumpers, interior trim, structural components Infotainment And Comfort: Radio, navigation system, power seats, windows, mirrors, sunroof Procedures Included Maintenance Procedures: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection/replacement Repair Procedures: Engine component removal/installation, transmission overhaul, brake caliper replacement, suspension component rebuild, electrical component diagnosis and repair Diagnostics: Troubleshooting guides, diagnostic trouble codes (DTCs) interpretation, component testing procedures Technical Specifications: Torque specifications, clearances, fluid capacities, electrical system parameters Technical Depth Depth Of Coverage: Comprehensive (from routine maintenance to complete engine and transmission rebuilds) 📊 Manual Specifications File Format Software Requirements: Web browser, internet connection Print Quality Digital Resolution: High-resolution (suitable for screen viewing and potential printing) Binding Type Digital Access Type: Subscription-based online access Paper Type Digital Format Advantage: Searchable text, hyperlinked sections, zoomable diagrams ⚙️ Engine Specifications Primary Engine Engine Code: BAS, BBD Engine Type: 4.2L Naturally Aspirated V8 Displacement: 4172 cc Bore X Stroke: 84.5 mm x 92.8 mm Compression Ratio: 11.1:1 Valvetrain: DOHC, 5 valves per cylinder (32 valves total) Block Material: Aluminum Alloy Cylinder Head Material: Aluminum Alloy Performance Horsepower: 335 hp @ 6500 rpm Torque: 317 lb-ft @ 3500 rpm Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Ignition System: Electronic Ignition with Coil-on-Plug 🔧 Transmission Standard Transmission Type: 5-speed Tiptronic Automatic Transmission Code: FZV Optional Optional Transmission: Not Applicable for 2003 S6 Features Drivetrain: Quattro All-Wheel Drive (Permanent) Tiptronic Functionality: Manual gear selection via shifter or steering wheel buttons 📐 Dimensions Exterior Length Sedan: 4813 mm (189.5 inches) Length Avant: 4849 mm (190.9 inches) Width: 1819 mm (71.6 inches) Height Sedan: 1442 mm (56.8 inches) Height Avant: 1465 mm (57.7 inches) Wheelbase: 2759 mm (108.6 inches) Weights Curb Weight Sedan: Approx. 1800 kg (3968 lbs) Curb Weight Avant: Approx. 1870 kg (4123 lbs) 🛡️ Safety Features Ratings NHTSA Front Crash Rating: 4 stars (driver), 4 stars (passenger) IIHS Side Impact Rating: Good Active Features Standard Safety Features: ABS, EBD, Traction Control (ASR), Electronic Stability Program (ESP) Passive Features Airbags: Front airbags, front side airbags, side curtain airbags (optional on some trims) Seatbelts: 3-point inertia-reel seatbelts with front pre-tensioners and load limiters 💡 Technology Features Infotainment Audio System: Bose premium sound system with CD player, optional navigation system. Climate Control: Automatic dual-zone climate control. Driver Assistance Cruise Control: Standard Parking Assistance: Optional rear parking sensors. Connectivity Mobile Integration: No native smartphone integration; optional Bluetooth preparation (via separate module). 🔧 Maintenance Service Intervals Oil Change Interval: Every 10,000 miles or 12 months, whichever comes first (or as indicated by the car's onboard service reminder system). Timing Belt Replacement: This engine uses a timing chain, not a belt. The chain and associated components (tensioners, guides) are designed for the life of the engine but require inspection. Fluid Specifications Engine Oil Specification: SAE 0W-40 or 5W-40 synthetic engine oil meeting VW 502 00 or 505 00 specification. Coolant Specification: G12 or G12+ antifreeze (pink/purple) mixed with distilled water in a 50/50 ratio. Transmission Fluid Specification: G 055 025 (Pentosin ATF1 or equivalent approved by Audi) for the 5-speed Tiptronic. Brake Fluid Specification: DOT 4 Known Issues Common Wear Items: Coil packs, spark plugs, PCV system components, oil cooler seals, front control arm bushings, door handle...