1998-2004 Audi A6 / S6 / allroad quattro / RS6 Service Manual
Audi Models Covered & Key Technical Specifications
Models: Audi A6, Audi A6 Avant, allroad quattro, Audi S6, Audi RS6
Sub-models / Variants: 2.7L V6 Turbo, 2.8L V6 Naturally Aspirated, 3.0L V6 Naturally Aspirated, 4.2L V8 Naturally Aspirated, 4.2L V8 Biturbo, Front-wheel drive (FWD), All-wheel drive (quattro)
Model Years: 1998–2004
Serial Numbers: APB (2000–2003), BEL (2003–2004), AHA (1998–2000), ATQ (2000–2001), AVK (2002–2004), ART (1999–2001), AWN (2002–2004), BBD (2002–2004), BAS (2003), BCY (2003–2004)
Technical Data:
- Engine Displacement: 2.7L, 2.8L, 3.0L, 4.2L
- Horsepower Range: 193 hp to 450 hp
- Transmission Types: 5-speed manual (01A), 6-speed manual (01E), 5-speed automatic Tiptronic (01V, 01L), Multitronic CVT (01J)
- Fuel Tank Capacity: 18.5 US gallons (70 liters) for V6 models
- Engine Configurations: V6 and V8 with 5 valves per cylinder
Audi Manual Features & Content Preview
1998–2004 Audi A6, S6, allroad quattro, and RS6 | Technical Reference
- Covers 1998–2004 Audi A6, A6 Avant, allroad quattro, S6, and RS6 C5 platform models, including V6 biturbo, naturally aspirated V6, V8, and V8 biturbo engine variants
- Original OEM publication from Bentley Publishers (937 pages), prepared for independent service professionals and owners with mechanical skills
- Contains detailed structural outlines for engine management, transmission service, suspension, steering, and electrical systems
- Available as an instant download directly to your device
- Accelerates workshop workflow: Full-text search finds any part number, diagnostic code, or component location in seconds
- Provides comprehensive technical data essential for proper vehicle repair planning
Documentation Walkthrough
This official workshop publication organizes technical information into 12 main sections, encompassing every major system of the C5 platform. The documentation begins with general maintenance and identification, detailing VIN decoding and service reminder resetting. Subsequent chapters address transmission and clutch systems, brakes, and electrical architecture, including the CAN-bus and on-board diagnostics (OBD). It also provides comprehensive system descriptions for the allroad quattro 4-level air suspension and the RS6 Dynamic Ride Control (DRC). Body and interior topics cover airbag systems, climate control housing, and seat electronics.
Specification and Reference Highlights
Technical depth is established through data tables detailing essential service parameters. Engine oil capacity is documented for the various powerplants, ranging from 5.7 liters for 2.8L engines to 8.5 liters for the BAS engine. Brake system reference charts include specifications for disc thickness and pad wear limits. Electrical diagnostic sections list component descriptions and pinout logic for the Bosch Motronic systems. Precise torque values for critical fasteners are highlighted, such as the 30 Nm specified for the engine oil drain plug and 40 Nm for tie-rod end lock nuts. Cooling system capacities are also outlined, with the 4.2L biturbo RS6 requiring 12.0 liters.
Reviewing these specifications beforehand streamlines the entire repair process in a professional bay or home garage setting. Working on automotive systems involves heavy components and high pressures. Always ensure a safe working environment, use properly rated lifting equipment, and verify all procedures against official factory specifications prior to engaging with mechanical assemblies.
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