1998-2004 Audi A6 / S6 / allroad quattro / RS6 Service Manual

Technical Scope for the 1998–2004 Audi A6, S6, allroad quattro, and RS6

• Covers 1998–2004 Audi A6, A6 Avant, allroad quattro, S6, and RS6 C5 platform models, including V6 biturbo, V6 naturally aspirated, V8, and V8 biturbo engine variants
• Original OEM publication from Bentley Publishers, specifically prepared for independent service professionals and owners with mechanical skills
• Contains detailed sections for general maintenance, engine management, transmission service, suspension and steering, electrical system, and body assembly
• Accessible from your device as soon as the order is placed
• Full-text search finds any part number or diagnostic code in seconds
• Laid out for standard letter and A4 printing
• Provides comprehensive technical data for components including suspension, braking systems, and fuel management
• This official reference documentation provides the technical specifications, torque values, and system diagrams required for maintenance work on C5 platform Audi models

Documentation Walkthrough

This workshop publication organizes technical information into 12 main sections encompassing every major system of the C5 platform. The scope begins with general maintenance and identification, detailing VIN decoding and service reminder resetting. Subsequent chapters address the engine and engine management, transmission and clutch systems, suspension, brakes, and electrical architecture, including the CAN-bus and on-board diagnostics (OBD) systems. It also includes comprehensive details on the allroad quattro 4-level air suspension and the RS6 Dynamic Ride Control (DRC) suspension system.

Body and interior maintenance topics include airbag systems, climate control housing, and seat electronics. The publication concludes with extensive what factory workshop documentation is structured to provide maintenance schedules, fastener torque charts, and component locations to aid in technical review and routine service.

Specification and Reference Highlights

Technical depth is provided through comprehensive tables and descriptive sections covering essential service parameters. Engine oil capacity is documented for the various V6 and V8 powerplants, ranging from 5.7 liters for 2.8L engines up to 8.5 liters for the BAS engine. Brake system service includes specifications for disc thickness and pad wear limits. Electrical diagnostic references include component descriptions and pinout logic for the Bosch Motronic engine management systems. Torque values for critical fasteners are provided, 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 detailed, with the 4.2L biturbo RS6 model requiring 12.0 liters. All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. This official 937-page Bentley Publishers OEM workshop manual covers the 1998–2004 Audi A6, S6, allroad quattro, and RS6, documenting engine, chassis, electrical, and suspension specifications for the C5 platform.