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Introduction
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Market Position
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Segment:
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Executive Mid-size Luxury Sedan/Wagon
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Competitors:
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BMW 5 Series, Mercedes-Benz E-Class, Lexus GS, Volvo S90.
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Key Features
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Platform:
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Volkswagen Group MLB platform
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Drivetrain:
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Front-wheel drive (FWD) and Quattro all-wheel drive (AWD) available.
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Technology Suite:
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Advanced MMI infotainment, optional virtual cockpit, driver assistance systems.
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Competitive Analysis
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Strength:
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Audi's reputation for interior quality, technology integration, and Quattro AWD system.
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Manual Coverage
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Systems Covered
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Electrical System:
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Complete electrical system diagnosis, wiring harnesses, component locations, connector pinouts, fuse box layouts, relay assignments, circuit descriptions.
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Engine Control:
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Engine control module (ECM) operation, sensor inputs, actuator outputs, ignition system, fuel injection system, emissions control systems.
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Transmission:
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Automatic transmission (8-speed Tiptronic) electrical controls, mechatronics unit, shift solenoids, transmission control module (TCM).
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Chassis Systems:
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ABS, ESP, ASR, Brake Assist electrical components and wiring, steering assist systems (electromechanical).
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Comfort And Convenience:
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Climate control, power seats, power windows, power locks, sunroof, lighting systems (LED, Xenon), keyless entry, alarm systems.
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Infotainment And Navigation:
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MMI system, audio components, navigation module, Bluetooth connectivity, voice control, displays, cameras.
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Procedures Included
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Troubleshooting:
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Systematic diagnostic procedures, symptom-based troubleshooting charts, fault code interpretation, diagnostic test modes.
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Component Replacement:
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Detailed instructions for replacing electrical components, sensors, actuators, modules, wiring harnesses.
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Connector Repair:
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Repair procedures for damaged connectors, pin replacement, terminal crimping.
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Module Coding And Adaptation:
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Guidance on coding new control modules and performing adaptation procedures using diagnostic tools.
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Technical Depth
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Depth:
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Comprehensive, covering all electrical circuits, component testing, and advanced diagnostic strategies suitable for professional technicians and advanced DIYers.
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Engine Specifications
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Primary Engine
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2.0L Tfsi (4-Cylinder):
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Engine Code: CGLD, CGMA. Displacement: 1984 cc. Bore x Stroke: 82.5 x 92.8 mm. Compression Ratio: 9.6:1. Power: ~220-252 hp. Torque: ~258-273 lb-ft.
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3.0L Tfsi (Supercharged V6):
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Engine Code: CGXC, CGXA, CRED. Displacement: 2995 cc. Bore x Stroke: 84.5 x 89.0 mm. Compression Ratio: 10.5:1. Power: ~310 hp. Torque: ~325 lb-ft.
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3.0L Tdi Clean Diesel (V6):
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Engine Code: CDUC, CPNB, CPNA. Displacement: 2967 cc. Bore x Stroke: 83.0 x 91.4 mm. Compression Ratio: 15.5:1. Power: ~240 hp. Torque: ~428 lb-ft.
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Performance
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Acceleration 0 60 Mph 3.0T:
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Approximately 4.5 - 4.9 seconds (Quattro).
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Fuel System
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Injection Type:
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Direct injection with port injection backup (TFSI).
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Fuel Requirement:
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Premium Unleaded Gasoline (91 AKI or higher) for TFSI engines, Ultra-Low Sulfur Diesel for TDI engines.
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Safety Features
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Ratings
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NHTSA Overall Rating:
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5-Star (for models tested)
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IIHS Top Safety Pick:
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Yes (for models achieving it during testing cycles)
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Active Features
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Stability Control:
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Electronic Stability Control (ESC) with Traction Control (ASR)
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Braking System:
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Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD), Brake Assist (BA)
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Driver Assistance Options:
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Adaptive Cruise Control (ACC), Audi Pre Sense (city and basic), Lane Departure Warning, Blind Spot Monitoring (Side Assist), Parking System Plus.
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Passive Features
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Airbags:
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Front airbags, front side airbags, side curtain airbags, knee airbags (driver).
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Seatbelts:
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3-point safety belts with pre-tensioners and force limiters, ISOFIX child seat anchors.
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Technology Features
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Infotainment
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Infotainment System:
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Audi Music Interface (MMI) with navigation, Bluetooth audio streaming, voice control.
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Display Technology:
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Central MMI display (7-inch or 8-inch), optional Audi Virtual Cockpit (12.3-inch digital instrument cluster).
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Driver Assistance
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Adaptive Cruise Control:
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Available Adaptive Cruise Control with Stop & Go functionality.
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Parking Assist:
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Parking sensors (front and rear), rearview camera, optional surround view cameras.
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Connectivity
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Connectivity Options:
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Bluetooth hands-free calling and audio, Wi-Fi hotspot capability (optional).
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Lighting
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Headlight Options:
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Xenon Plus headlights with LED daytime running lights, optional Matrix LED headlights.
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Maintenance
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Service Intervals
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Oil Change Interval:
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Typically every 10,000 miles or 1 year, whichever comes first, using synthetic oil.
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Major Service Interval:
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Spark plugs: 40,000-60,000 miles (depending on engine). Timing belt: N/A (Timing chain used). Cabin air filter: Every 20,000 miles or 2 years.
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Fluid Specifications
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Engine Oil Type 2.0T:
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SAE 0W-30 or 0W-40, meeting VW 502 00 / 505 00 or VW 504 00 / 507 00 specifications.
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Engine Oil Type 3.0T:
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SAE 5W-30 or 5W-40, meeting VW 502 00 / 505 00 specifications.
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Coolant Type:
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G13 coolant (Purple) or equivalent meeting VW TL 774 J.
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Brake Fluid Type:
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DOT 4 Class 6
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Known Issues
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Electrical Issues:
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Water ingress in ECU connectors, faulty door lock actuators, MMI system glitches, LED headlight issues.
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Engine Issues:
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Oil consumption in early 2.0T models, PCV valve failures, thermostat housing leaks.
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Transmission Issues:
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Mechatronic unit failures (less common but costly), transmission fluid leaks.
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Vehicle History
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Brand Heritage
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Audi Legacy:
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Part of the Volkswagen Group, Audi has a long history of automotive innovation dating back to the early 20th century, known for its design, engineering, and Quattro technology.
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Model Evolution
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A6 Lineage:
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The A6 nameplate has been used since 1994, succeeding the Audi 100. The C7 generation represented a significant redesign focused on lighter materials, advanced technology, and refined styling.
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Production
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Manufacturing Locations:
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Neckarsulm, Germany; Ingolstadt, Germany; Changchun, China (for the Chinese market).
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