This Bentley repair and service manual contains in-depth maintenance, service and repair information for Audi A6 models from 1998 to 2004. The aim throughout has been simplicity and clarity, with practical explanations, step-by-step procedures and accurate specifications. Whether you're a professional or a do-it-yourself Audi owner, this manual helps you understand, care for and repair your Audi.

Models covered:

• A6 1998-2004
• allroad quattro 2000-2004
• S6 2002-2004
• RS6 2003-2004

Engines covered:

• 1998-2001 2.8 liter V6 (AHA, ATQ)
• 1999-2004 4.2 liter V8 (ART, AWN, BBD)
• 2000-2004 2.7 liter V6 biturbo (APB, BEL)
• 2002-2004 3.0 liter V6 (AVK)
• 2003-2004 4.2 liter V8 (BAS)
• 2003-2004 4.2 liter V8 biturbo (BCY)

Transmissions covered:

• 5-speed manual AWD (01A)
• 6-speed manual AWD (01E)
• 5-speed automatic AWD (1L)
• 5-speed automatic FWD or AWD (1V)
• Continuously variable transmission (CVT) FWD (01J)

Technical highlights:

• Maintenance procedures from changing the oil to replacing the interior ventilation microfilter. This manual tells you what to do and how and when to do it
• Step-by-step engine timing belt service
• Cylinder head cover and crankshaft seal replacement
• Cooling system filling and bleeding, coolant pump replacement and engine cooling fan and radiator service
• Fuel injection and ignition system diagrams and explanations, including three different Bosch Motronic engine management systems
• Clutch, flywheel and rear main seal service
• Multi-link front suspension repair procedures, including stabilizer bar link, control arm and axle boot replacement
• Brakes, steering, suspension and ABS maintenance, troubleshooting, and repair
• Heating and air-conditioning repair, including A/C component replacement
• Body, hood and sunroof repairs and adjustments
• Electrical system service, with an easy-to-use illustrated component locator section
• Wiring schematics for selected models, including power distribution and grounds