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Introduction
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Market Position
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Segment:
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Premium Compact Executive Sedan/Wagon (A4 B8)
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Competitive Analysis
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Key Competitors:
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BMW 3 Series, Mercedes-Benz C-Class, Lexus IS, Infiniti G35/G37, Volvo S60.
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Key Features
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Vehicle Highlights:
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Chassis rigidity, advanced suspension design (multi-link front), Quattro all-wheel drive, sophisticated interior, direct-injection engines, innovative technology features.
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Manual Value
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Benefit To Owner:
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Empowers owners and independent technicians with factory-level diagnostic and repair information, facilitating accurate and efficient maintenance and repairs, saving time and money.
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Manual Coverage
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Systems Covered
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Powertrain:
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Engine mechanical (1.8 TFSI, 2.0 TFSI, 3.2 FSI, 2.7 TDI, 3.0 TDI), engine electrical, fuel system, cooling system, exhaust system, automatic transmissions (Multitronic, Tiptronic), manual transmissions, Quattro all-wheel drive system.
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Chassis:
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Suspension (front and rear), steering system, brake system (hydraulic, ABS, ESP), wheels and tires.
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Body & Electrical:
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Body structure, exterior components, interior trim, climate control system, safety systems (airbags, seatbelts), lighting systems, instrument panel, infotainment system, vehicle electrical system (wiring diagrams, modules, sensors).
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Procedures Included
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Maintenance:
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Scheduled maintenance, oil changes, filter replacements, spark plug replacement, brake pad/rotor replacement, fluid checks and flushes.
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Repair:
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Engine repair (head gasket, timing chain, pistons), transmission overhaul, suspension component replacement, brake caliper rebuild, electrical component diagnosis and replacement, body panel repair and replacement.
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Diagnostics:
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Troubleshooting guides, diagnostic trouble codes (DTCs), common fault diagnosis, procedures for using diagnostic scan tools (e.g., VCDS, ODIS).
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Calibration And Coding:
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Component adaptation, control module coding, sensor calibration (e.g., steering angle sensor, parking assist sensors).
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Technical Depth
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Depth Level:
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Expert-level diagnostics, detailed component removal and installation, complete rebuild procedures, wiring diagrams, specifications, and torque values.
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Engine Specifications
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Primary Engine
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Engine Options:
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1.8 TFSI (CABA, CDHA, CDHB), 2.0 TFSI (CDNB, CDNC, CAEB), 3.2 FSI (CCSA), 2.7 TDI (BPP, BSG), 3.0 TDI (CAPA, CCWA).
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Performance
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1.8 Tfsi (Cdn A):
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118 kW (160 PS) @ 4500-6200 rpm, 250 Nm (184 lb-ft) @ 1500-4500 rpm
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2.0 Tfsi (Cdnb):
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132 kW (180 PS) @ 4000-6000 rpm, 320 Nm (236 lb-ft) @ 1500-3900 rpm
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3.2 Fsi (Ccsa):
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195 kW (265 PS) @ 6500 rpm, 330 Nm (243 lb-ft) @ 3250-5000 rpm
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3.0 Tdi (Capa):
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171 kW (233 PS) @ 4000 rpm, 500 Nm (369 lb-ft) @ 1750-2500 rpm
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Fuel System
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Injection Type:
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Direct Injection (FSI) and Common Rail Direct Injection (TDI), Turbocharged
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Engine Management
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ECU Type:
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Bosch Motronic / MED17 / EDC17 (Specific to engine variant)
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Emissions Control
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Emission Standard:
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Euro 4 / LEV II (Region Dependent)
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Transmission
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Standard
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Transmission Options:
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6-speed Manual (0B2), Continuously Variable Transmission (Multitronic 0AW), 6-speed Automatic (Tiptronic 09L, 0BQ).
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Optional
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All Wheel Drive:
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Quattro permanent all-wheel drive system with self-locking center differential (Torsen) or crown-gear center differential, and advanced torque vectoring.
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Features
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Multitronic Features:
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Dynamic shift program, manual mode with paddle shifters (optional), efficient operation.
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Fluid Specifications
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Manual Transmission Fluid:
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G 052 171 A2 or G 055 726 A2 (GL-4/GL-5 SAE 75W-90)
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Automatic Transmission Fluid:
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G 055 005 A2 (Multitronic) or G 055 025 A2 (Tiptronic)
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Safety Features
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Ratings
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NHTSA Ratings:
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5-star frontal and side crash test ratings (US models)
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IIHS Ratings:
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Top Safety Pick
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Active Features
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Driver Assistance:
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Anti-lock Braking System (ABS), Electronic Stability Program (ESP) with Traction Control (ASR), Electronic Brake-force Distribution (EBD), Brake Assist (BA), Tire Pressure Monitoring System (TPMS), Adaptive Cruise Control (ACC) (optional), Audi Lane Assist (optional), Audi Side Assist (optional).
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Passive Features
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Airbag System:
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Driver and front passenger airbags, front side airbags, Sideguard head curtain airbags, optional rear side airbags.
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Seatbelts:
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Three-point inertia-reel seatbelts with belt tensioners and force limiters, ISOFIX child seat anchorage points.
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Technology Features
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Infotainment
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Mmi System:
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Multi Media Interface (MMI) with optional navigation, Bluetooth connectivity, CD/DVD player, SD card reader. Audi Music Interface (AMI) for iPod integration.
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Sound Systems:
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Standard Audi sound system, optional Bang & Olufsen sound system.
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Driver Assistance
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Advanced Options:
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Adaptive Cruise Control (ACC) with integrated radar, Audi Parking System Advanced (front and rear parking sensors with rearview camera), Audi Drive Select (adjusts steering, throttle, and suspension settings).
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Connectivity
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Bluetooth Profiles:
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Hands-Free Profile (HFP), Object Push Profile (OPP), Phone Book Access Profile (PBAP).
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Lighting
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Headlight Options:
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Halogen headlights with LED daytime running lights, optional Xenon Plus headlights with LED daytime running lights and adaptive cornering function.
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Maintenance
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Service Intervals
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Oil Change Interval:
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Typically 15,000 km (9,375 miles) or 12 months, whichever comes first. Flexible service system (ASF) may adjust based on driving conditions. Consult owner's manual for exact intervals and conditions.
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Major Service Points:
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Timing belt replacement (for older engines, though B8 TFSI engines use chains), spark plug replacement (e.g., 60,000-100,000 km), brake fluid flush (every 2 years), cabin air filter replacement (yearly).
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Fluid Specifications
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Engine Oil Type:
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SAE 0W-30 or 5W-30, meeting VW 504 00 / 507 00 specifications (e.g., Mobil 1 ESP Formula, Castrol Edge Professional).
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Coolant Type:
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G12 EVO (pink) or G13 (purple) coolant, mixed with distilled water at a 50/50 ratio.
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Brake Fluid Type:
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DOT 4 Class 6 (G 000 000 M9)
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Known Issues
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Common Complaints Tfsi:
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Oil consumption issues (piston rings, PCV system), timing chain tensioner wear, ignition coil failures, PCV valve issues, carbon buildup on intake valves (direct injection).
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Common Complaints Tdi:
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DPF (Diesel Particulate Filter) regeneration issues, glow plug failures, EGR valve problems, high-pressure fuel pump issues.
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Common Complaints Chassis:
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Worn control arm bushings (front and rear), premature brake wear, steering rack leaks, sunroof drain blockage leading to water ingress.
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Vehicle History
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Brand Heritage
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Audi Legacy:
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Audi AG, a German luxury automobile manufacturer, part of the Volkswagen Group. Known for its 'Vorsprung durch Technik' (Advancement through Technology) slogan and pioneering front-wheel drive and Quattro AWD systems.
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Model Evolution
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A4 Lineage:
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The A4 succeeded the Audi 80/90 and has been produced in multiple generations since 1994. The 2009 model represents the introduction of the highly acclaimed B8 generation, designed by Walter de Silva.
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Production
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Manufacturing Locations:
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Main production facility in Ingolstadt, Germany. Also produced in Neckarsulm, Germany, and Kaluga, Russia (for the Russian market).
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Platform
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Chassis Platform:
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Volkswagen Group MLB (Modular Longitudinal Matrix) platform, shared with models like the Audi Q5 and Porsche Macan (though Macan is later).
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