Get dealership-level service and repair information with this official OEM workshop manual for the 2011-2018 Audi A6 (C74G). Whether you’re performing routine maintenance or tackling advanced repairs, this comprehensive PDF guide provides step-by-step instructions, wiring diagrams, and manufacturer-authorized procedures for precise diagnostics and repairs.

Key Features:

✅ Complete OEM Repair Manual – Covers all systems, service procedures, and repairs.

✅ Wiring Diagrams Included – Essential for electrical troubleshooting and accurate repairs.

✅ Dealer-Authorized Instructions – The same procedures trusted by Audi technicians.

✅ Step-by-Step Guidance – From basic servicing to extensive repairs.

✅ Easy-to-Use PDF Format – Instant access on any device, print only what you need.

🛠 Why Choose This Manual?

Whether you’re a DIY enthusiast or a professional technician, this factory-approved Audi A6 manual ensures you have the most precise and detailed service instructions available.

Table of Contents : 2011-2018 Audi A6 Repair Manual

A- Workshop Repair Manual

• Maintenance (Edition 06.2015).
• Maintenance (Edition 12.2018).
• Technical data for engines.
• Technical data for diesel engines.
• 4-cyl. direct injection engine (1.8, 2.0 ltr. 4-valve turbo TFSI – generation II).
• 4-cyl. direct injection engine (1.8, 2.0 ltr. 4-valve TFSI – generation III).
• 4-cyl. TDI engine (2.0 ltr. 4-valve common rail – generation II).
• 6-cyl. direct injection engine (2.5 ltr., 2.8 ltr. 4-valve).
• 6-cyl. direct-injection engine with a supercharger (3.0 ltr. 4-valve TFSI).
• 6-cyl. TDI engine (3.0 ltr. 4-valve common rail – generation II).
• 6-cyl. TDI engine, 3.0 ltr. 4-valve common rail (EA897 Gen. I).
• 6-cyl. direct-injection engine with a supercharger (3.0l. 4-valve TFSI, EA837evo).
• 8-cyl. direct injection engine (4.0 ltr. 4-valve TFSI).
• Servicing 4-cyl. engine, 1.8 ltr., 2.0 ltr. 4-valve TFSI (EA 888, Gen. II).
• Servicing 4-cyl. engine, 2.0 ltr. 4-valve TFSI (EA 888, Gen. III).
• Servicing 6-cyl. TDI engine, common rail (EA 897 Gen. I).
• TDI injection and glow plug system (6-cyl. 3.0 ltr. 4-valve common rail).
• TDI injection and glow plug system (4-cyl. 2.0 ltr. 4-valve common rail, generation II).
• Direct petrol injection and ignition system (4-cyl. 2.0 ltr. 4-valve turbo with timing chain).
• Direct injection and ignition system (8-cyl. 4.0 ltr. 4-valve TFSI).
• Simos direct petrol injection and ignition system (6-cyl. 2.5 ltr. 4-valve).
• Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve).
• Simos direct petrol injection and ignition system (6-cyl. 2.8 ltr. 4-valve).
• Fuel supply system, diesel engines.
• Fuel supply system, petrol engines.
• 6-speed manual gearbox 0CS, 0DJ.
• 6-speed manual gearbox 0B1, front-wheel drive.
• 7-speed dual-clutch gearbox 0B5 (S Tronic).
• 7-speed dual-clutch gearbox 0CK.
• 8-speed automatic gearbox 0BW hybrid, front-wheel drive.
• 8-speed automatic gearbox 0BK, four-wheel drive.
• Multitronic 0AW, front-wheel drive.
• Servicing 6-speed manual gearbox 0B1, front-wheel drive.
• Servicing 6-speed manual gearbox 0CS, 0DJ, 0CX.
• Servicing 7-speed dual clutch gearbox 0B5 (S tronic).
• Servicing 7-speed dual clutch gearbox 0CJ, 0CL, 0CK, 0DN, 0DP, 0HL.
• Servicing 8-speed automatic gearbox.
• Servicing Multitroni 0AW.
• Rear final drive 0BC, 0BD, 0BE, 0BF.
• Rear final drive 0BF and 0BE – sport differential.
• Running gear, front-wheel drive and four-wheel drive.
• WheelTyre Guide (Edition 10.2019).
• WheelTyre Guide  (Edition 01.2019).
• Wheels and tyres.
• Brake system.
• Heating, air conditioning.
• Auxiliarysupplementary heater.
• Air conditioner with refrigerant R134a.
• Air conditioners with refrigerant R1234yf – General information.
• Basic information on high-voltage vehicles.
• Communication.
• Trailer Operation Guide.
• Specifications for testing the braking force.
• Fitting instructions radio communication systems.
• Electrical system_ General information.
• Electrical system.
• Electrical system, hybrid (Engine ID CHJA).
• General Body Repairs.
• Body Repairs.
• General body repairs, exterior.
• General body repairs, interior.

B- Electrical Wiring Diagrams

• Electrical Wiring Diagrams From January 2011.

Sample Pages

🚘 2011–2018 Audi A6 (C7/4G) – Specs, Common Problems, Maintenance, Recalls & DTC Codes

⚙️ Technical Specs & Performance

• 🧬 Platform/Generation: A6 C7 (Typ 4G), model years 2011–2018
• 🛠️ Common Engines (varies by market/trim):
  • ⛽ 2.0T TFSI I4 (approx. 180–211 PS variants listed for C7)
  • ⛽ 2.8 FSI V6 (approx. 204 PS variants listed for C7)
  • ⛽ 3.0T (supercharged) V6 quattro (approx. 300–310 PS variants listed for C7)
  • 🧪 Hybrid variants exist in some markets/years
• ⚙️ Transmissions: Automatic options vary by drivetrain/engine (market-dependent; commonly 7-speed S tronic / 8-speed Tiptronic configurations)
• 🛞 Drivetrain: FWD or quattro AWD (market/engine dependent)
• 🏁 Typical 0–60 mph: ~5.5–8.0 sec (varies widely by engine/drivetrain)

🔧 Top 10 Common Mechanical Issues (Owner-Reported Patterns)

1. ⚙️ Oil consumption / leaks (PCV/valve cover/timing cover seepage)
2. 🧯 Water pump/thermostat leaks (coolant smell, low coolant warnings)
3. 🧊 Coolant system faults (after-run pump/aux pump issues on some engines)
4. 🌀 Turbo underboost (2.0T) (wastegate/boost leak/diverter valve)
5. ⛓️ Timing chain tensioner noise (rattle on cold start on some variants)
6. 🧰 PCV system failure (rough idle, lean codes, oil leaks)
7. 🛑 Brake rotor warping / vibration (steering shake under braking)
8. 🦾 Control arm bushings wear (front-end clunks over bumps)
9. 🛞 Wheel bearing humming (speed-dependent drone)
10. 🧭 Steering/EPS noises (creaks/assist inconsistencies)

🧩 Quick Fix Guide (Compact)

• 🛢️ Oil leaks/consumption: inspect PCV + seals; verify correct oil spec and service intervals
• 🧯 Coolant leaks: pressure test system; inspect water pump/thermostat housing and hoses
• 🌀 Underboost: smoke test intake; check diverter valve and charge pipes
• 🦾 Clunks: inspect front control arms/links; align after replacement

💡 Top 10 Common Electrical Issues (Owner-Reported Patterns)

1. 📺 MMI/infotainment freezing (reboots, no audio, black screen)
2. 🛰️ Navigation/phone pairing glitches (Bluetooth drops)
3. 🔋 Battery drain (comfort module wake-ups, accessories not sleeping)
4. 🚨 Parking sensor false alerts (water intrusion / sensor failure)
5. 💡 LED/DRL failures (headlight module issues on some units)
6. 🔑 Keyless entry/intermittent start authorization
7. 🪟 Window regulator / switch faults
8. 🌧️ Rain/light sensor quirks (auto wipers/headlights inconsistent)
9. 🧠 CAN communication faults (multiple modules throwing U-codes)
10. 🎈 Airbag/SRS warning light (seat occupancy/connector issues)

🥊 Top Competitors

• 🇩🇪 BMW 5 Series (F10) ↗
• 🇩🇪 Mercedes-Benz E-Class (W212) ↗
• 🇯🇵 Lexus GS (4th gen) ↗
• 🇬🇧 Jaguar XF (X250) ↗
• 🇯🇵 Infiniti M (M35/M37/M45/M56) ↗
  

📊 Pros & Cons

🛠️ Maintenance Schedule (Smart Baseline)

📢 Recalls, Advisories & Safety Alerts

• 🧯 Coolant after-run pump recall (example campaign): Audi issued a safety recall covering certain 2012–2017 Audi vehicles with 2.0L TFSI engines due to an electric after-run coolant pump defect (risk conditions described by Audi/NHTSA documentation).
• 🧾 Check open recalls by VIN:
  • 🇺🇸 Audi USA Recall/Service Campaign Lookup (VIN tool)
  • 🛡️ NHTSA Recall Lookup (VIN / make-model)
• ⚠️ Reminder: Recall volume varies by year/engine. Always verify by VIN before purchase or long trips.

🧾 DTC Trouble Code List (10 Codes Each)

🚗 Engine Control Module (ECM)

⚙️ Transmission Control Module (TCM)

🛑 ABS / ESC (Brake System)

🎈 SRS Airbag System

🧠 Body Control / CAN Communication

Table of Contents : 2005-2011 Audi A6 Repair Manual

A- Workshop Repair Manual

• Maintenance (Edition 05.2017).
• Maintenance (Edition 11.2015).
• Technical Data For Engines.
• 4-Cyl. Direct Petrol Injection Engine (2.0L. 4-Valve Turbo), Mechanics BPJ BYK.
• 4-TDI Unit Injector Engine (2.0L. 4-Valve), Mechanics BLB BNA BRE BRF BVG.
• 4-Cyl. TDI Engine (2.0L. 4-Valve Common Rail), Mechanics CAGB CAHA CAHB.
• 6-Cyl. Direct-Injection Engine With A Supercharger (3.0L. 4-Valve Tfsi), Mechanics CAJA CCAA.
• 6-Cyl. Direct Petrol Injection Engine (3.2L. 4-Valve), Mechanics BKH AUK BYU.
• 6-Cyl. Injection Engine (2.4L. 4-Valve), Mechanics Bdw.
• 6-Cyl. Direct Injection Engine (2.8L. 4-Valve), Mechanics BDX CCDA CCEA.
• 6-Cyl. TDI Engine (2.7L._ 3.0L. 4-Valve Common Rail, Eu5), Mechanics.
• 6-Cyl. TDI Engine (2.7L._ 3.0 Ltr. 4-Valve Common Rail), Mechanics BMK BNG BPP BSG ASB.
• 6-Cyl. Injection Engine (3.0 Ltr. 5-Valve), Mechanics Bbj.
• 8-Cyl. Direct Petrol Injection Engine (4.2 Ltr. 4-Valve), Mechanics BVJ.
• 8-Cyl. Engine (4.2L. 5-Valve With Timing Chains), Mechanics BAT BNK.
• 10-Cyl. Direct Petrol Injection Engine (5.0L. 4-Valve Turbo Rs6), Mechanics BUH.
• 10-Cyl. Direct Petrol Injection Engine (5.2L. 4-Valve), Mechanics BXA.
• TDI Injection And Glow Plug System (4-Cyl. 2.0L. 4-Valve Cr) CAGB CAHA CAHB.
• TDI Injection And Glow Plug System (4-Cyl. 2.0L. Unit Injector, 4-Valve) BLB BNA BRE BRF BVG.
• TDI Injection And Glow Plug System (6-Cyl. 2.7 Ltr., 3.0 Ltr. 4-Valve Common Rail).
• Direct Petrol Injection And Ignition System (10-Cyl. 5.0L. 4-Valve Turbo) BUH.
• Direct Injection And Ignition System (6-Cyl. 2.8L. 4-Valve) BDX CCDA CCEA.
• Direct Petrol Injection And Ignition System (10-Cyl. 5.2L. 4-Valve) BGS BXA.
• Direct Petrol Injection And Ignition System (4-Cyl. 2.0L. 4-Valve Turbo) BPJ BYK.
• Direct Petrol Injection And Ignition System (8-Cyl. 4.2L. 4-Valve) BVJ.
• Injection And Ignition System (6-Cyl. 3.0L. Injection Engine) Avk BBJ.
• Injection And Ignition System (8-Cyl. 5-Valve Injection Engine) BAT BNK.
• Simos Direct Injection And Ignition System (6-Cyl. 3.0L. Tfsi 4-Valve) CAJA CCAA.
• Simos Direct Petrol Injection And Ignition System (6-Cyl. 3.2L. 4-Valve With Avs) CALA.
• Simos Direct Petrol Injection And Ignition System (6-Cyl. 3.2L. 4-Valve) AUK BKH BYU.
• Simos Injection And Ignition System (6-Cyl. 2.4 Ltr.) BDW.
• Fuel Supply System, Diesel Engines.
• Fuel Supply System, Petrol Engines.
• 6-Speed Manual Gearbox 01X, Front-Wheel Drive.
• 6-Speed Manual Gearbox 02X, Four-Wheel Drive.
• 6-Speed Manual Gearbox 0A2, Front-Wheel Drive.
• 6-Speed Manual Gearbox 0A3, Four-Wheel Drive.
• Automatic Gearbox 09E, Four-Wheel Drive.
• Automatic Gearbox 09L, Four-Wheel Drive.
• Multitronic 01J, Front-Wheel Drive.
• Multitronic 0An, Front-Wheel Drive.
• Servicing 6-Speed Manual Gearbox 0A2, Front-Wheel Drive.
• Servicing 6-Speed Manual Gearbox 0A3, Four-Wheel Drive.
• Servicing Automatic Gearbox 09E, Four-Wheel Drive.
• Servicing Automatic Gearbox 09L, Four-Wheel Drive.
• Servicing Multitronic 01J And 0An.
• Rear Final Drive 01R.
• Rear Final Drive 08V.
• Rear Final Drive 0AR.
• Running Gear, Front-Wheel Drive And Four-Wheel Drive.
• Wheeltyre Guide (Edition 10.2019).
• Wheeltyre Guide (Edition 01.2019).
• Wheels And Tyres.
• Brake System.
• Air Conditioner.
• Auxiliary Heater.
• Air Conditioner With Refrigerant R134A.
• Trailer Operation Guide.
• Communication.
• Fitting Instructions Radio Communication Systems.
• Fitting Instructions Retrofitting Key-Operated Switch To Deactivate The Airbag.
• General Body Repairs.
• Body Repairs.
• General Body Repairs, Exterior.
• General Body Repairs, Interior.
• Electrical System_ General Information.
• Electrical System.
• Electrical Wiring Diagrams

• Electrical Wiring Diagrams From Model 2005.

Sample Pages

2005–2011 Audi A6 (C6) Comprehensive Guide

Overview

The 2005–2011 Audi A6 (C6 generation) is a midsize luxury sedan that offered German engineering, refined styling, and advanced technology. Available as a sedan or Avant (wagon), it competed in the premium executive sedan segment with sophisticated design and Quattro all-wheel drive capability.

Technical Specifications

Engines Available:

• 2.0T (2006–2011): 2.0L turbocharged I4, 211 hp, 258 lb-ft torque
• 3.2 FSI (2005–2010): 3.2L V6, 255 hp, 243 lb-ft torque
• 4.2 FSI (2007–2011): 4.2L V8, 350 hp, 325 lb-ft torque
• S6 (2007–2011): 5.2L V10, 435 hp, 398 lb-ft torque
• Diesel (select markets): 2.7L/3.0L TDI V6

Transmissions:

• 6-speed manual (rare, 2.0T only)
• CVT (Multitronic, FWD models)
• 6-speed Tiptronic automatic
• 7-speed S tronic dual-clutch (later models)

Drivetrain:

• Front-wheel drive (FWD) – base models
• Quattro all-wheel drive (AWD) – most models

Dimensions:

• Length: 193.5 inches
• Wheelbase: 114.2 inches
• Width: 73.8 inches
• Height: 57.9 inches
• Cargo: 14.1 cubic feet

Performance:

• 0-60 mph: 5.4–8.5 seconds (depending on engine)
• Fuel economy: 17–28 mpg (combined, depending on engine)
• Towing capacity: Up to 4,400 lbs (with proper equipment)

Standard Features:

• Leather seats
• Power front seats
• Dual-zone climate control
• Wood trim
• Bluetooth (later years)
• Xenon headlights (premium trims)

10 Top Mechanical & Electrical Issues

1. Timing Chain Tensioner Failure (3.2 V6)

• • Symptoms: Rattling noise on cold start, rough idle, check engine light, potential catastrophic engine failure
  • Root Cause: Factory timing chain tensioners wear prematurely, causing chain slack and potential timing jump
  • Fix: Replace timing chain, tensioners, guides, and related components
  • Cost: $2,500–$4,500

2. Carbon Buildup on Intake Valves (Direct Injection Engines)

• • Symptoms: Rough idle, misfires, loss of power, poor fuel economy, hesitation during acceleration
  • Root Cause: Direct injection design prevents fuel from cleaning intake valves, causing carbon deposits
  • Fix: Walnut blasting or chemical cleaning of intake valves
  • Cost: $400–$800

3. Multitronic CVT Transmission Failure

• • Symptoms: Shuddering, slipping, delayed engagement, transmission overheating, complete failure
  • Root Cause: CVT design weakness, inadequate fluid servicing, metal chain wear
  • Fix: Transmission rebuild or replacement; regular fluid changes can extend life
  • Cost: $4,000–$8,000 (replacement)

4. Oil Consumption Issues

• • Symptoms: Low oil warnings, blue smoke from exhaust, frequent oil top-ups (1 quart per 1,000 miles or more)
  • Root Cause: Worn piston rings, valve stem seals, PCV system issues, design tolerances
  • Fix: Engine rebuild with updated pistons/rings, or live with frequent oil top-ups
  • Cost: $5,000–$10,000 (rebuild); $50–$100/month (oil top-ups)

5. Air Suspension Failure

• • Symptoms: Suspension warning light, uneven vehicle height, compressor running constantly, sagging corners
  • Root Cause: Air spring leaks, compressor wear, valve block failures, sensor issues
  • Fix: Replace air springs, compressor, or convert to conventional coil springs
  • Cost: $800–$2,500 per air spring; $1,500–$2,500 (compressor); $1,500–$3,000 (coil conversion)

6. Ignition Coil and Spark Plug Failures

• • Symptoms: Misfires, rough running, check engine light, reduced performance, poor fuel economy
  • Root Cause:Ignition coils are wear items; carbon buildup exacerbates the problem
  • Fix: Replace all ignition coils and spark plugs as a set
  • Cost: $600–$1,200

7. Thermostat and Coolant Issues

• • Symptoms: Overheating, erratic temperature gauge, poor heater performance, coolant leaks
  • Root Cause: Plastic thermostat housing cracks, water pump failures, coolant flange leaks
  • Fix: Replace thermostat, housing, and related coolant components
  • Cost: $400–$1,000

8. Electronic Parking Brake Failure

• • Symptoms: Warning lights, brake won’t engage/disengage, grinding noise, emergency brake stuck
  • Root Cause:Caliper motor failures, module issues, cable stretch, corrosion
  • Fix: Replace rear brake calipers with integrated motors
  • Cost: $800–$1,500 per side

9. MMI (Multi Media Interface) System Failures

• • Symptoms: Screen goes blank, system freezes, navigation errors, no audio, unresponsive controls
  • Root Cause:Software glitches, control unit failures, screen backlighting issues, DVD drive problems
  • Fix: Software updates, control unit replacement, or screen replacement
  • Cost: $500–$2,500

10. Window Regulator Failures

• • Symptoms: Slow window operation, windows falling into door, clicking noises, windows won’t move
  • Root Cause:Plastic regulator components break, cable frays, motor wear
  • Fix: Replace window regulator assembly
  • Cost: $300–$600 per window

Top 5 Competitors (2005–2011)

1. BMW 5 Series (E60/E61) – Sportier handling, similar luxury, comparable reliability issues
2. Mercedes-Benz E-Class (W211/W212) – Main German rival, more conservative styling, air suspension issues
3. Lexus GS – Superior reliability, less engaging driving dynamics, strong resale value
4. Acura RL/TL – More affordable, better reliability, less prestige
5. Cadillac CTS/STS – Domestic alternative, V8 power, lower resale value

Top 10 Recalls, Advisories & TSB Highlights

Recalls:

1. Fuel System/Fuel Tank – Fuel tank flange may leak (2005–2008 models)
2. Airbag Module – Takata airbag inflator recall (multiple years)
3. Fuel Pump Control Module – Fire risk due to corrosion (2005–2008)
4. Power Steering – Hydraulic line may leak (2005–2011)
5. Sunroof – Glass may detach while driving (2006–2012)

Technical Service Bulletins (TSBs):

6. Oil Consumption – TSB for excessive oil use; software updates and consumption testing procedures
7. MMI Software Updates – Multiple updates for system stability and functionality
8. Transmission Reprogramming – CVT and automatic transmission shift quality improvements
9. Climate Control – Blend door motor replacement procedures
10. Xenon Headlight Ballast – Premature ballast failures and replacement guidelines

Maintenance Schedule

Every 10,000 miles or 1 year:

• Oil and filter change (synthetic required)
• Inspect brakes, tires, lights
• Rotate tires

Every 20,000 miles or 2 years:

• Replace cabin air filter
• Inspect air filter (replace if needed)
• Check all fluid levels

Every 40,000 miles or 4 years:

• Replace engine air filter
• Replace spark plugs (some models)
• Inspect suspension components
• Brake fluid flush

Every 60,000 miles:

• Replace transmission fluid (CVT requires more frequent service)
• Inspect/replace drive belts
• Replace spark plugs (if not done at 40k)

Every 80,000–100,000 miles:

• Replace coolant
• Inspect timing chain/tensioners (3.2 V6 – critical)
• Replace fuel filter
• Inspect/replace water pump

As Needed:

• Brake pads/rotors (typically 30,000–50,000 miles)
• Battery (4–6 years)
• Tires (30,000–50,000 miles)
• Wiper blades annually

Note: Multitronic CVT requires fluid changes every 35,000–40,000 miles for longevity.

10 Buyer FAQs

Q1: Which engine is most reliable in the C6 A6? The 3.2 V6 is generally considered most reliable if the timing chain service has been completed. The 2.0T is efficient but has turbo/carbon buildup issues. Avoid the V10 unless you have deep pockets for maintenance.

Q2: Should I avoid the Multitronic CVT transmission? Yes, if possible. The CVT has a poor reliability record. Look for Quattro models with the Tiptronic automatic or rare manual transmission models.

Q3: How much does it cost to maintain an A6 annually? Expect $2,000–$4,000 annually for routine maintenance and repairs if the car is in good condition. Older examples or those with deferred maintenance can exceed $5,000–$8,000/year.

Q4: Is the air suspension worth it? Air suspension provides excellent ride quality but is expensive to repair. Many owners convert to conventional springs when the air system fails to save on long-term costs.

Q5: What mileage is too high for a used C6 A6? With proper maintenance, these can reach 150,000–200,000 miles. However, look for examples under 100,000 miles with complete service records. High-mileage examples (120,000+) should be priced accordingly and have documented major service completion.

Q6: Are parts expensive? Yes. OEM Audi parts are premium-priced. Aftermarket alternatives exist but quality varies. Labor costs at Audi specialists or dealerships are $120–$200/hour.

Q7: Is the 4.2 V8 reliable? The 4.2 V8 is fairly robust but has carbon buildup, ignition coil, and oil consumption issues. It requires premium fuel and gets poor fuel economy (16–18 mpg combined).

Q8: Should I buy an extended warranty? Given the repair costs, an extended warranty from a reputable provider can provide peace of mind, especially for the transmission, air suspension, and electronics.

Q9: What should I look for during a pre-purchase inspection? Check for oil consumption, transmission smoothness, air suspension function, timing chain noise on startup (3.2 V6), service records, MMI operation, and any warning lights. A pre-purchase inspection by an Audi specialist is essential.

Q10: Are these cars expensive to insure? Insurance costs vary by location and driver, but luxury vehicles typically cost more to insure due to higher repair costs and parts prices. Expect above-average premiums.

Final Buyer Recommendations

Should You Buy a 2005–2011 Audi A6?

Buy If:

• You want refined German luxury at a depreciated price point
• You have access to an independent Audi specialist for maintenance
• You can budget $3,000–$5,000 annually for maintenance and repairs
• You find a well-maintained example with complete service records
• You’re buying a Quattro model with the 3.2 V6 and 6-speed Tiptronic (best combination)
• The timing chain service has been completed (3.2 V6 models)

Avoid If:

• You need Toyota/Lexus-level reliability
• You can’t afford unexpected $2,000–$5,000 repair bills
• The car has a Multitronic CVT transmission
• Service records are incomplete or missing
• You’re on a tight budget with no emergency fund
• You plan to use it as a high-mileage commuter without substantial savings

Best Model Year & Configuration:

2009–2011 A6 3.2 Quattro with Tiptronic – These later models have improved electronics, refined drivetrains, and if well-maintained, offer the best balance of performance, luxury, and relative reliability. The 3.2 V6 provides adequate power with better fuel economy than the V8/V10.

Alternatives to Consider:

• Lexus GS/LS – Superior reliability, lower maintenance costs
• Acura TL/RL – Japanese reliability with luxury features
• Infiniti M35/M45 – Good balance of performance and reliability
• 2006+ BMW 5 Series – If you prefer sportier dynamics (similar maintenance costs)

Bottom Line

The Audi C6 A6 is a compelling used luxury sedan offering exceptional comfort, technology, and prestige at depreciated prices. However, it demands a financially prepared owner who understands that German luxury comes with premium maintenance costs. With proper care and a healthy repair budget, these cars can provide years of refined driving enjoyment. Buy the best-maintained example you can afford, establish a relationship with a trusted Audi specialist, and budget appropriately for ownership. This is not a car for the budget-conscious or mechanically inexperienced buyer.

Recommended budget: Purchase price + $5,000–$10,000 emergency fund for first-year repairs and deferred maintenance catch-up.

Vehicle Details

• Make: Audi
• Models: Audi A6, Audi A7 Sportback
• Years: 2018, 2019, 2020
• Platform: MLB Evo
• Variants: Sedan, Avant, and Sportback
• Drive Configurations: Front-wheel drive (FWD) and quattro all-wheel drive (AWD)
• Engine Types:
  • Gasoline: TFSI
  • Diesel: TDI

Key Features

• Authenticity: Directly from Audi’s official resources, ensuring accurate and reliable information.
• Fully Colored Diagrams: Easy-to-understand wiring schematics for precise troubleshooting.
• Comprehensive Scope: Covers every aspect of your vehicle, from basic maintenance to advanced repairs.
• PDF Format: Portable and accessible on various devices for on-the-go reference.

Why This Manual is Essential

• Dealer-Equivalent Knowledge: Gain access to the same detailed information as Audi-certified technicians.
• Cost Savings: Perform repairs and maintenance yourself to save on labor costs.
• Increased Reliability: Follow manufacturer-approved procedures to ensure long-lasting repairs.

Perfect For:

• DIY Audi owners who want to take charge of their vehicle’s upkeep.
• Independent repair shops seeking official repair guidelines.
• Technicians aiming to provide dealer-level service quality.

Download Your Copy Now

Equip yourself with the 2018-2020 Audi A6 & Audi A7 Sportback OEM Workshop Manual and confidently handle all your car maintenance and repair needs! 🚘📘

Contents: 2018-2020 Audi A6 & A7 Sportback (4K,4KA,4KF)

Workshop Service and Repair Manual

1-Maintenance
2-Technical data for engines
3-4-cylinder TDI engine, 2.0 ltr. 4-valve common rail (EA 288 EVO)
4-4-cylinder direct-injection engine (2.0 ltr. 4-valve TFSI, EA 888 Gen. III)
5-6-cylinder TDI engine, 3.0 ltr. 4-valve common rail (EA 897 Gen. I)
6-6-cylinder TDI engine, 3.0 ltr. 4-valve common rail (EA 897 – Gen. II)
7-6-cylinder TDI engine, 3.0 ltr. 4-valve common rail (EA 897 – Gen. II, S6, S7)
8-6-cylinder direct-injection engine (2.9 ltr., 3.0 ltr. 4-valve TFSI EA 839)
9-Servicing 4-cylinder TDI engine, common rail (EA 288 EVO)
10-Servicing 4-cylinder engine, 2.0 ltr. 4-valve TFSI (EA 888, Gen. III)
11-Servicing 6-cylinder TDI engine, common rail (EA 897 Gen. II)
12-Servicing 6-cylinder TDI engine, common rail (EA 897 Gen. I)
13-Servicing 6-cylinder engine, 2.9 ltr., 3.0 ltr. 4-valve TFSI EA 839
14-Fuel supply system
15-7-speed dual-clutch gearbox 0DK
16-7-speed dual-clutch gearbox 0CJ, 0CK, 0HL, 0DN, 0DP
17-8-speed automatic gearbox 0D5
18-Servicing 7-speed dual-clutch gearbox 0CJ, 0CL, 0CK, 0DN, 0DP, 0HL
19-Servicing 8-speed automatic gearbox
20-Rear final drive 0D2, 0D3, 0DB, 0B0, 0BX, 0DG, 0G2, 09R
21-Running gear, front-wheel drive, and four-wheel drive
22-Wheels and tires
23-WheelTyre Guide (Edition 01.2019)
24-WheelTyre Guide (Edition 10.2019)
25-Brake system
26-Communication
27-Driver assist systems
28-Basic information on high-voltage vehicles
29-Fitting instructions radio communication systems
30-Air conditioner with refrigerant R134a
31-Air conditioners with refrigerant R1234yf – General information
32-Auxiliarysupplementary heater
33-Heating, air conditioning
34-General Body Repairs
35-Body Repairs
36-General body repairs, seats
37-General body repairs, interior
38-General body repairs, exterior
39-Electrical system_ General information
40-Electrical system

Electrical Wiring Diagrams

• General Information.
• Electrical Wiring Diagrams.

Sample Pages

🚘 2018–2020 Audi A6 & A7 Sportback – Common Issues, Specs, Competitors, Maintenance & DTCs

The 2018–2020 Audi A6 and A7 Sportback offer a blend of luxury, performance, and cutting-edge tech. Built on the MLB Evo platform, these models bring sleek design and advanced safety and infotainment systems. Here’s a comprehensive guide including common issues, technical specs, top rivals, maintenance schedule, and DTCs for these elegant German sedans and sportbacks.

🔧 10 Common Mechanical Issues

• • ⚠️ Oil consumption in 3.0L TFSI engines
  • 🔩 Suspension noise from front control arm bushings
  • 🚿 Water pump leaks on V6 models
  • 🌡️ Thermostat housing failures causing overheating
  • 🔊 Rattling noise from exhaust valves during cold starts
  • 🔧 Power steering fluid leaks (electric-assisted systems)
  • 💨 Turbocharger wastegate actuator faults
  • 🛞 Uneven tire wear due to alignment issues
  • 🧯 Brake rotor warping under heavy use
  • 💥 Timing chain rattle at startup (V6 engines)

💡 10 Common Electrical Issues

• • 🧠 MMI (Multi Media Interface) black screen or freezing
  • 📶 Keyless entry malfunctions and key recognition failures
  • 🚫 Faulty ambient lighting system or flickering LEDs
  • 🌀 Adaptive cruise control sensor calibration errors
  • 🔋 Battery drain due to software bugs in modules
  • 🚘 Backup camera glitches or no video
  • 📡 GPS navigation signal dropouts
  • 🌫️ Headlight DRL module failures
  • 📱 Bluetooth/CarPlay connectivity issues
  • ⚙️ Lane assist and side assist sensor faults

📊 Technical Specifications

🏁 Top Competitors

• BMW 5 Series (G30)
• Mercedes-Benz E-Class (W213)
• Volvo S90
• Genesis G80

✅ Pros & Cons

🛠️ Maintenance Schedule

🧾 DTC Trouble Code List

🧠 Engine Control Module (ECM)

⚙️ Transmission Control Module (TCM)

🛑 ABS / ESC (Brake System)

🎈 SRS Airbag System

💡 Body Control / CAN Communication

Engines Covered

• 4-cyl. TDI engine, 2.0l. 4-valve common rail (EA 288 EVO) DFBA DEZD DEZF.
• 4-cyl. direct injection engine (2.0l. 4-valve TFSI, EA 888 Gen. III) DKNA DLHA DLHB.
• 4-cyl. direct injection engine (2.0l. 4-valve TFSI, EA 888 Gen. III, B cycle) DKUA DKYA.
• 6-cyl. TDI engine, 3.0l. 4-valve common rail (EA897 – Gen. II) DDVB DDVE DDVF.
• 6-cyl. TDI engine, 3.0l. 4-valve common rail (EA897 Gen. I) CVMD.
• 6-cyl. direct injection engine (2.9l., 3.0l. 4-valve TFSI EA 839) DLZA DKMB.

Table of Contents : 2018-2020 Audi A6 & A7 Sportback

Workshop Service and Repair Manual

• Maintenance.
• Technical data for engines.
• 4-cyl. TDI engine, 2.0l. 4-valve common rail (EA 288 EVO) DFBA DEZD DEZF.
• 4-cyl. direct injection engine (2.0l. 4-valve TFSI, EA 888 Gen. III) DKNA DLHA DLHB.
• 4-cyl. direct injection engine (2.0l. 4-valve TFSI,EA 888 Gen. III, B cycle) DKUA DKYA.
• 6-cyl. TDI engine, 3.0l. 4-valve common rail (EA897 – Gen. II) DDVB DDVE DDVF.
• 6-cyl. TDI engine, 3.0l. 4-valve common rail (EA897 Gen. I) CVMD.
• 6-cyl. direct injection engine (2.9l., 3.0l. 4-valve TFSI EA 839) DLZA DKMB.
• 6-cyl. TDI engine, 3.0l. 4-valve common rail (EA 897 – Gen. II, S6, S7) DEWA.
• Servicing 4-cyl. TDI engine, common rail (EA 288 EVO) DEZE DEZB DFBA DEZF DEZD.
• Servicing 4-cyl. engine, 2.0 ltr. 4-valve TFSI (EA888, Gen. III B cycle).
• Servicing 4-cyl. TDI engine, common rail (EA 288 Gen. I).
• Servicing 4-cyl. engine, 2.0 ltr. 4-valve TFSI (EA 888, Gen. III).
• Servicing 6-cylinder TDI engine, common rail (EA 897 Gen. II).
• Servicing 6-cyl. TDI engine, common rail (EA 897 Gen. I).
• Servicing 6-cyl. engine, 2.9 ltr., 3.0 ltr. 4-valve TFSI EA 839.
• Fuel supply system.
• 7-speed dual clutch gearbox 0CJ, 0CK, 0HL, 0DN, 0DP.
• 8-speed automatic gearbox 0D5.
• Servicing 7-speed dual clutch gearbox 0CJ, 0CL, 0CK, 0DN, 0DP, 0HL.
• Servicing 8-speed automatic gearbox.
• Rear final drive 0D2, 0D3, 0DB, 0B0, 0BX, 0DG, 0G2, 09R.
• Running gear, front-wheel drive, and four-wheel drive.
• WheelTyre Guide (Edition 10.2019).
• WheelTyre Guide (Edition 01.2019).
• Wheels and tires.
• Brake system.
• Driver-assist systems.
• Basic information on high-voltage vehicles.
• Communication.
• Fitting instructions radio communication systems.
• Air conditioner with refrigerant R134a.
• Air conditioners with refrigerant R1234yf – General information.
• Auxiliarysupplementary heater.
• Heating, air conditioning.
• General Body Repairs.
• Body Repairs.
• General body repairs, seats.
• General body repairs, interior.
• General body repairs, exterior.
• Electrical system_ General information.
• Electrical system.

Electrical Wiring Diagrams

• General Information.
• Electrical Wiring Diagrams.

Sample Pages

Common Issues Reported By Owners

The 2020 Audi A6 and A7 Sportback are luxury vehicles known for their advanced technology, refined interiors, and dynamic performance. While these models are generally reliable and well-regarded, some owners have reported issues. Here’s an overview of the common problems and maintenance considerations:

Common Issues with the 2020 Audi A6 and A7 Sportback

1. Electrical System Malfunctions

• Issue: With numerous advanced electronics, these models may experience glitches in systems such as the infotainment, driver-assistance features, or lighting.
• Symptoms: Unresponsive MMI system, warning lights for driver assistance, or malfunctioning LED headlights or taillights.
• Solution: Apply software updates to affected systems or replace faulty components. A system reset may resolve minor issues.

2. Mild Hybrid System Issues

• Issue: Both models come with a 48-volt mild hybrid system that may encounter issues, such as belt alternator starter (BAS) failure or energy recuperation malfunctions.
• Symptoms: Reduced fuel efficiency, start/stop system not functioning, or hybrid system warnings.
• Solution: Inspect and replace the BAS or address wiring and software-related faults.

3. Transmission and Drivetrain Problems

• Issue: The 7-speed S-Tronic dual-clutch transmission may occasionally exhibit rough or delayed shifting, especially during low-speed maneuvers.
• Symptoms: Jerky gear changes, hesitation when accelerating, or difficulty engaging reverse.
• Solution: Perform a transmission fluid change and update the transmission control software. Persistent issues may require inspection of the mechatronic unit or clutch components.

4. Air Suspension Faults (Optional Equipment)

• Issue: Vehicles equipped with air suspension may experience issues, such as leaks in the system or failure of the compressor.
• Symptoms: Uneven ride height, suspension fault warnings, or a bouncy ride.
• Solution: Inspect for leaks in air struts or hoses and replace faulty components. Regular maintenance can prevent major failures.

5. Engine Oil Consumption

• Issue: Some 2.0L and 3.0L engines are prone to consuming more oil than expected, although this is less common in newer models compared to older Audis.
• Symptoms: Low oil warning light or the need to top off oil between service intervals.
• Solution: Monitor oil levels closely and perform oil consumption tests if the problem persists. Address any leaks or internal engine issues.

6. Infotainment and Connectivity Glitches

• Issue: The dual-touchscreen MMI system can occasionally freeze, lag, or fail to connect with smartphones via Bluetooth, Apple CarPlay, or Android Auto.
• Symptoms: Unresponsive screens, dropped connections, or inability to pair devices.
• Solution: Perform a system reset, update the software, or replace faulty hardware components if necessary.

7. Brake Rotor and Pad Wear

• Issue: Due to the vehicle’s weight and performance, brake components may wear out faster than expected, particularly with spirited driving.
• Symptoms: Squealing or grinding noises, vibrations during braking, or reduced braking performance.
• Solution: Replace brake pads and rotors as needed with high-quality OEM or aftermarket components.

8. Cooling System Issues

• Issue: Leaks in the water pump or thermostat housing can lead to overheating or coolant loss.
• Symptoms: Coolant level warnings, visible leaks, or engine overheating.
• Solution: Replace the water pump, thermostat, or associated gaskets as needed. Regular coolant flushes help maintain system health.

9. Advanced Driver Assistance System (ADAS) Problems

• Issue: Features like adaptive cruise control, lane-keeping assist, or traffic sign recognition may malfunction or give inaccurate readings.
• Symptoms: Driver-assistance system warnings, erratic behavior, or failure of features to activate.
• Solution: Recalibrate sensors and cameras or update the ADAS software. Faulty components may require replacement.

10. Interior Material Wear

• Issue: Some owners report premature wear on soft-touch surfaces, leather seats, or trim pieces, particularly with high usage or improper care.
• Symptoms: Fading, peeling, or cracking of materials.
• Solution: Regularly clean and condition interior materials. Replace damaged components if necessary.

Maintenance Tips for the 2020 Audi A6 and A7 Sportback

1. Oil Changes: Use Audi-approved synthetic oil and follow the recommended service intervals.
2. Transmission Service: Change the S-Tronic fluid and filter every 40,000 miles to ensure smooth operation.
3. Software Updates: Keep the infotainment and ADAS systems updated to prevent glitches.
4. Tire Maintenance: Rotate tires regularly and maintain proper alignment to prevent uneven wear.
5. Brake Inspections: Check pads and rotors periodically, especially if the vehicle is driven aggressively.
6. Cooling System Care: Flush the coolant and inspect the system regularly to prevent leaks and overheating.

Summary

The 2020 Audi A6 and A7 Sportback are luxurious, feature-rich vehicles offering excellent performance and comfort. However, they can be prone to certain issues, particularly with the electrical system, infotainment, and mild hybrid components. Regular maintenance, software updates, and addressing problems early can help keep these vehicles running smoothly.

If you’re considering purchasing one of these models, a pre-purchase inspection and review of the service history are highly recommended to ensure reliability and avoid unexpected repairs.