🏷️ Basic Information Identification Make: Audi Model: A6 Year: 2005 Chassis Code: C5 (4B) Codes Manual Product Name: 2005 Audi A6 (C5-4B) Service and Repair Manual 👋 Introduction Market Position Segment: Executive Sedan / Mid-Size Luxury Sedan Positioning: Positioned as Audi's flagship sedan of its era, competing with models like the BMW 5 Series and Mercedes-Benz E-Class. Competitive Analysis Key Competitors: BMW 5 Series (E60), Mercedes-Benz E-Class (W211), Lexus GS Series, Jaguar S-Type. Key Features Design Philosophy: Understated luxury, advanced technology, Quattro all-wheel drive capability, comfortable and refined driving experience. Distinguishing Elements: Distinctive Audi styling (singleframe grille introduced later in generation), sophisticated interior materials, strong performance options. 📋 Manual Details Coverage Areas General Coverage: All Models & All Repairs A-Z Specificity: Vehicle Specific (Not Generic) Target Audience: Dealership Technicians, Professional Mechanics, Advanced DIYers Page Count Estimated Page Count: Varies by specific publisher; typically 1000+ pages for comprehensive manuals. Manual Type Type: Service and Repair Manual Language Language: English Format Format: Digital (PDF implied, common for technician manuals) 📖 Manual Coverage Systems Covered Powertrain: Engine Mechanical, Engine Control Systems (ECU/DME), Fuel System, Ignition System, Exhaust System, Transmission (Automatic & Manual), Drivetrain (FWD & Quattro AWD) Chassis: Suspension (Front & Rear), Steering System, Brake System (ABS, ESP), Wheel & Tire Specifications, Drivetrain Components Electrical: Body Control Modules (BCM), Lighting Systems, Instrumentation, HVAC Controls, Power Accessories (Windows, Locks, Seats), Audio Systems, Navigation Systems, Sensor & Actuator Diagnostics, Wiring Diagrams Body: Body Repair, Interior Trim, Exterior Trim, Doors, Hood, Trunk, Bumpers, Seals, Glass Procedures Included Maintenance: Scheduled Maintenance, Oil Changes, Filter Replacements, Spark Plugs, Belts, Hoses, Fluid Checks & Changes Diagnostics: Troubleshooting Guides, Symptom-Based Diagnostics, DTC (Diagnostic Trouble Code) Interpretation, Component Testing Procedures Repair Rebuild: Engine Overhaul, Transmission Rebuild, Brake Component Replacement, Suspension Component Replacement, Electrical Component Repair, Body Panel Repair Specifications Data: Torque Specifications, Clearances, Fluid Capacities, Component Dimensions, Electrical Schematics Technical Depth Depth: Comprehensive. Covers routine maintenance to complete system overhauls and diagnostics, mirroring dealership technician procedures. 📊 Manual Specifications File Format Format: PDF (Portable Document Format) - Typically searchable and printable. Print Quality Quality: High Resolution Graphics and Text for Clear Diagrams and Instructions Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Variant 1: 2.7T V6 Biturbo (APB, AZA) Displacement 1: 2.7 Liters (2671 cc) Horsepower 1: 250 HP @ 5800-6500 RPM (approx.) Torque 1: 258 lb-ft (350 Nm) @ 1800-4000 RPM (approx.) Engine Variant 2: 2.8 V6 FSI (BBG) Displacement 2: 2.8 Liters (2773 cc) Horsepower 2: 210 HP @ 6000 RPM (approx.) Torque 2: 210 lb-ft (285 Nm) @ 3200 RPM (approx.) Engine Variant 3: 4.2 V8 FSI (BCY) Displacement 3: 4.2 Liters (4172 cc) Horsepower 3: 300 HP @ 6200 RPM (approx.) Torque 3: 295 lb-ft (400 Nm) @ 3000-4200 RPM (approx.) Engine Configuration Layout: V6 or V8 Aspiration: Naturally Aspirated (2.8, 4.2) or Twin-Turbocharged (2.7T) Fuel System Type: Electronic Fuel Injection (EFI) Fuel Type: Premium Unleaded Gasoline (91 Octane or higher recommended) Performance 0 60 Mph 2.7T: Approx. 6.4 seconds (Quattro, Tiptronic) 0 60 Mph 4.2: Approx. 6.0 seconds (Quattro, Tiptronic) 🔧 Transmission Standard Standard Transmission: 5-speed Manual (for certain engine/drivetrain configurations) Optional Optional Transmission: 5-speed Tiptronic Automatic (with manual shift mode) Features Drivetrain: Front-Wheel Drive (FWD) standard, Audi Quattro All-Wheel Drive optional/standard on higher trims. Fluid Specifications Automatic Transmission Fluid: G 052 162 A2 (or equivalent ATF specification) 📐 Dimensions Exterior Length: Approx. 4815 mm (189.6 in) Width: Approx. 1766 mm (69.5 in) excluding mirrors Height: Approx. 1415 mm (55.7 in) Wheelbase: Approx. 2760 mm (108.7 in) Weights Curb Weight Min: Approx. 1550 kg (3417 lbs) for 2.8 FWD Curb Weight Max: Approx. 1750 kg (3858 lbs) for 4.2 Quattro Cargo Trunk Capacity: Approx. 510 Liters (18.0 cu ft) Wheels Tires Wheel Bolt Pattern: 5x112 Typical Wheel Size: 16-inch, 17-inch, or 18-inch alloy wheels Typical Tire Sizes: 215/55R16, 235/45R17, 235/40R18 (varies by trim and wheel) 🛡️ Safety Features Ratings NHTSA Front Driver: Good (for models tested) NHTSA Front Passenger: Good (for models tested) IIHS Front Small Overlap: Not Rated (Vehicle generation predates consistent testing) Active Features ABS: Standard Anti-lock Braking System Esp: Standard Electronic Stability Program (ESP/ASR) Passive Features Airbags Front: Standard Dual Front Airbags Airbags Side: Optional/Standard Front Side Airbags, Optional Rear Side Airbags Seatbelts: Pretensioning Front Seatbelts, Load Limiters, Rear 3-point Seatbelts 💡 Technology Features Infotainment Navigation: Optional Audi Navigation System (often DVD-based, MMI not yet introduced). Audio System: Standard Audi Symphony radio, optional Bose premium sound system. Driver Assistance Cruise Control: Standard cruise control. Parking Assistance: Optional Parking System (rear parking sensors). Connectivity Phone Integration: Optional Bluetooth preparation or integrated hands-free system. Convenience Features Lighting: Xenon Plus headlights with headlight washers, automatic leveling (optional/standard on higher trims). 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 7,500 to 10,000 miles (12,000-16,000 km) or...