🏷️ Basic Information

Make:

Audi

Model:

A6

Year:

2005

Chassis Code:

C6

Market Segment:

Executive Car

👋 Introduction

Vehicle Segment:

The Audi A6 (C6) is positioned as a premium executive sedan, competing with rivals like the BMW 5 Series and Mercedes-Benz E-Class.

Key Competitors:

BMW 5 Series, Mercedes-Benz E-Class, Lexus GS, Jaguar S-Type.

Vehicle Strengths:

Known for its refined interior, advanced technology (for its time), quattro all-wheel drive capability, and comfortable ride.

Benefit To Owner:

Provides DIY enthusiasts and professional technicians with the necessary detailed electrical information to diagnose and repair common and complex electrical issues, reducing reliance on dealership services.

📋 Manual Details

Primary Focus:

Electrical Systems and Components

Additional Coverage:

Battery, Starter, Generator, Cruise Control, Windshield Wiper/Washer System, Exterior Lights, Switches, Interior Lights, Switches, Wiring

Estimated Pages:

Varies by specific edition, typically 500-1500+ pages for comprehensive electrical manuals

Type:

Service and Repair Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Power Generation Storage:

Battery charging system (generator/alternator), battery testing and replacement, starter motor operation and troubleshooting.

Lighting:

Headlights (low/high beam, DRLs), taillights, brake lights, turn signals, fog lights, interior lighting (dome, map, vanity), ambient lighting, switch functionality and wiring.

Wipers Washers:

Windshield wiper motor, park switch, intermittent wiper module, washer pump, fluid level sensor, control switches and wiring.

Cruise Control:

System operation, control module diagnostics, speed sensors, actuator, switches, and wiring harness.

Wiring Diagrams:

Detailed electrical schematics for all major systems, component identification, connector pinouts, wire colors, and routing information.

Switches:

Ignition switch, light switches, wiper/washer switches, door lock switches, window switches, HVAC controls, hazard switch, horn switch, and their associated circuitry.

Troubleshooting:

Systematic diagnostic procedures for electrical faults, symptom-based troubleshooting guides, use of diagnostic tools (e.g., multimeter, oscilloscopes).

Repair:

Component replacement (e.g., starter, alternator, wiper motor), wiring harness repair (splice, crimp, repair broken wires), switch replacement.

Testing:

Procedures for testing individual electrical components, circuits, fuses, relays, and sensors.

Diagnostic Capability:

Advanced diagnostic strategies for complex electrical issues, including CAN bus communication principles and basic troubleshooting.

Wiring Diagram Detail:

High detail on wiring harnesses, connector types, component locations, and power distribution.

📊 Manual Specifications

Format:

PDF

Printability:

Full Printable

Zoom:

Zoom IN/OUT enabled

Binding:

Digital Download (No physical binding)

Paper:

N/A (Digital)

Delivery:

Instant Download

Reader:

Adobe PDF Reader

Unzipping:

WinZip or equivalent

Operating Systems:

All Versions of Windows & Mac

⚙️ Engine Specifications

Available Engines 2005:

The 2005 Audi A6 (C6) was offered with several engine options globally, most commonly: 3.2L FSI V6 (8-cylinder) and 4.2L FSI V8. Specific market availability varied.

3.2L Fsi V6 Power:

Approximately 255 hp @ 6500 rpm

3.2L Fsi V6 Torque:

Approximately 243 lb-ft @ 3250 rpm

4.2L Fsi V8 Power:

Approximately 335 hp @ 6800 rpm

4.2L Fsi V8 Torque:

Approximately 317 lb-ft @ 3500 rpm

Fuel Type:

Premium Unleaded Gasoline

Injection Type:

Fuel Stratified Injection (FSI) - Direct Injection

Coolant Type:

G12+ (Pink) or equivalent silicate-free ethylene glycol coolant

🔧 Transmission

Transmission Type 3.2L:

6-speed Tiptronic automatic transmission (often paired with quattro)

Transmission Type 4.2L:

6-speed Tiptronic automatic transmission (standard with quattro)

Drive System:

Quattro all-wheel drive (standard on many models, especially V8).

Automatic Transmission Fluid:

G 052 162 A1 or equivalent specified by Audi. Refer to specific vehicle VIN for exact fluid type.

📐 Dimensions

Length:

Approx. 4916 mm (193.5 in)

Width:

Approx. 1855 mm (73.0 in)

Height:

Approx. 1455 mm (57.3 in)

Wheelbase:

Approx. 2843 mm (112.0 in)

Curb Weight 3.2L Quattro:

Approx. 1700 kg (3748 lbs)

Curb Weight 4.2L Quattro:

Approx. 1870 kg (4123 lbs)

Trunk Volume:

Approx. 546 liters (19.3 cu ft)

🛡️ Safety Features

NHTSA Front Impact:

5-Star (for 2005 model year, general assessment of Audi A6)

IIHS Front Impact:

Good (for 2005 model year, general assessment of Audi A6)

Stability Control:

Electronic Stability Control (ESC) / ESP

Traction Control:

Traction Control System (ASR)

Airbags:

Front airbags, side airbags, curtain airbags (front and rear).

Seatbelts:

3-point inertia-reel seatbelts with front-seat belt tensioners.

💡 Technology Features

Mmi System:

Multi Media Interface (MMI) system with navigation, radio, climate control, and vehicle settings. Early versions can be complex and prone to glitches.

Parking Aid:

Optional parking sensors (front and rear) and rearview camera.

Bluetooth:

Optional Bluetooth interface for hands-free calling.

Headlights:

Xenon headlights with LED daytime running lights (DRLs) and adaptive cornering lights were available options.

🔧 Maintenance

Oil Change Interval:

Typically every 10,000 miles or 1 year, whichever comes first (using synthetic oil). Consult owner's manual for specific recommendations based on driving conditions.

Major Service Intervals:

Spark plug replacement (around 60,000-100,000 miles depending on type), timing belt/chain inspection (chain is typically lifetime, belt models require replacement).

Engine Oil Type:

SAE 5W-30 or 5W-40 Full Synthetic, meeting VW 502 00 or VW 505 00 specifications.

Engine Oil Capacity 3.2L:

Approx. 6.9 liters (7.3 US quarts)

Engine Oil Capacity 4.2L:

Approx. 8.0 liters (8.5 US quarts)

Power Steering Fluid:

G 002 000 or equivalent hydraulic fluid.

Common Electrical Problems:

Faulty headlight washers, issues with door lock actuators, MMI (Multi Media Interface) system glitches, parking sensor failures, HVAC control module issues, and occasional CAN bus communication errors.

Common Mechanical Problems:

Oil consumption in early FSI engines, PCV valve failures, timing chain wear (on some engines), and potential transmission control module issues.

📚 Vehicle History

Audi Legacy:

Audi has a long history of producing premium vehicles known for engineering, design, and advanced technology, particularly with its quattro all-wheel-drive system.

A6 Lineage:

The A6 nameplate replaced the Audi 100. The 2005 model represents the second generation (C6) of the A6, introduced in late 2004, featuring a significant redesign over the C5 generation.

C6 Generation Years:

2004-2011 (model years for North America typically 2005-2011).

Primary Assembly Location:

Neckarsulm, Germany

🏆 Awards & Recognition

Car And Driver Odi:

Car and Driver recognized the Audi A6 (C6) on its '10Best' list multiple times during its production run, highlighting its engineering and driving dynamics.

Reliability Index:

Reliability ratings for the 2005 A6 vary; while generally well-regarded for its luxury and performance, some owners reported higher than average repair costs, particularly related to electronics and complex systems.