Segment:
Executive Mid-size Sedan/Wagon
Key Competitors:
BMW 5 Series, Mercedes-Benz E-Class, Lexus GS
Platform:
Volkswagen Group PL45 platform (shared with VW Passat B5)
Drivetrain Options:
Front-wheel drive (FWD) and Torsen-based quattro all-wheel drive.
Design Philosophy:
Premium styling, refined interior, quattro performance, advanced technology for its era.
Engine Systems:
Engine mechanicals, fuel injection, ignition, cooling, lubrication, exhaust, emissions control
Drivetrain Systems:
Manual transmission, automatic transmission (Tiptronic), quattro all-wheel drive system, differentials, driveshafts, axles
Suspension Steering Brakes:
Front and rear suspension components, steering system, power steering, hydraulic brake system, ABS, ESP
Electrical Systems:
Battery, charging system, starting system, lighting, instruments, body control modules, infotainment, sensors, wiring diagrams
Body Chassis Comfort:
Body structure, exterior panels, doors, windows, interior trim, climate control, airbags, seat adjustments
Maintenance Procedures:
Scheduled maintenance, fluid changes, filter replacements, spark plug replacement, brake pad replacement
Diagnostic Procedures:
Troubleshooting guides, fault code interpretation, diagnostic tool usage, component testing
Repair Procedures:
Removal and installation of engine components, transmission service, suspension and steering repair, brake system overhauls, electrical component replacement
Disassembly Assembly:
Detailed step-by-step instructions for component disassembly and reassembly
Adjustment Calibration:
Procedures for adjusting various systems, including clutch, parking brake, and sensor calibration
Depth:
Comprehensive; covers basic maintenance to advanced diagnostics and component overhauls.
Illustrations:
Includes detailed pictorial diagrams, exploded views, and photographs.
Service Tools:
References specific Audi special service tools and their usage.
Specifications:
Includes torque specifications, wear limits, fluid capacities, and measurement data.
Engine Options:
2.8L V6 (AAH, ACK, AHL), 2.7L Biturbo V6 (ARE, BES), 4.2L V8 (ARS)
Engine Options Additional
Diesel Engines:
1.9L TDI (AFN, AVG), 2.5L TDI (AKE, AYM, BFC, BDG)
V6 2.8L Horsepower:
Approx. 204 hp
V6 2.7T Horsepower:
Approx. 250 hp
V8 4.2L Horsepower:
Approx. 300 hp
Fuel Delivery:
Electronic Fuel Injection (EFI)
Engine Management:
Bosch Motronic or similar electronic control unit (ECU)
Crash Test Performance:
Generally good for its era, though specific official ratings may vary by region and test methodology.
Stability Control:
Electronic Stability Program (ESP) and Anti-lock Braking System (ABS) standard or available.
Airbags:
Front airbags, side airbags, and optional front and rear head curtain airbags.
Seatbelts:
Pretensioning front seatbelts with load limiters.
Oil Change Interval:
Typically every 7,500 - 10,000 miles (12,000 - 16,000 km) or 12 months, depending on driving conditions and oil specification.
Timing Belt Replacement:
For 2.8L V6 and 2.5L TDI engines, typically around 70,000 - 100,000 miles (110,000 - 160,000 km). The 2.7T and 4.2L V8 engines use a timing chain system.
Engine Oil Specification:
API SG/SH/SJ/SL, ACEA A3/B3 or VW 500 00 / 502 00 / 505 00; Viscosity typically 0W-40, 5W-40, or 5W-30 depending on climate and specific engine.
Transmission Fluid Automatic:
G 052 162 A2 (or equivalent ATF like Pentosin ATF1)
Coolant Specification:
G 12 or G 12+ antifreeze (ethylene glycol-based with silicate inhibitors)
Common Wear Items:
CV joints, control arm bushings, wheel bearings, ignition coils (especially on 2.7T), mass air flow (MAF) sensors, oil leaks from valve covers and oil cooler seals.
Electrical Gremlins:
Can experience various electrical issues due to aging wiring and complex control modules. Common issues include window regulators, door lock actuators, and dashboard warning lights.
Audi Specific Concerns:
Timing belt service on V6 engines requires careful adherence to procedures due to interference design. The 2.7T engine's twin turbos and associated plumbing can be complex to service.
Brand Focus:
Audi is known for its luxury, performance, and advanced technology (e.g., quattro).
C5 Generation Introduction:
Introduced in 1997 for the 1998 model year, replacing the Audi A6 C4. The C5 generation significantly updated styling, technology, and platform.
Facelift:
Received a significant facelift for the 2002 model year, including updated exterior styling (headlights, grille, taillights), interior refinements, and new engine options.
Production Years:
1997-2004
Industry Acclaim:
The Audi A6 C5 was generally well-received for its blend of luxury, performance, and all-weather capability (especially with quattro).
Consumer Reports Reviews:
Likely received mixed reviews from consumer organizations, often praising comfort and performance but noting potential reliability concerns typical of European luxury cars of the era.
