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Introduction
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Market Position
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Segment:
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Executive Sedan / Mid-size Luxury
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Target Audience:
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Affluent professionals and families seeking comfort, performance, and advanced technology.
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Competitive Analysis
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Competitors:
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BMW 5 Series, Mercedes-Benz E-Class, Lexus GS, Volvo S80
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Key Features
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Design Philosophy:
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Understated elegance, build quality, quattro all-wheel-drive system.
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Platform:
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Volkswagen Group PL45 platform (shared with VW Passat B5)
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Manual Coverage
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Systems Covered
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Powertrain:
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Engine, Fuel System, Ignition System, Exhaust System, Cooling System, Lubrication System
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Drivetrain:
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Transmission (Automatic & Manual), Drive Axles, Differentials, AWD System (Quattro)
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Chassis:
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Suspension (Front & Rear), Steering System, Brakes (Hydraulic & ABS), Wheels & Tires
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Electrical:
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Battery, Charging System, Starting System, Lighting, Instrumentation, Wiper/Washer Systems, Audio System, Power Accessories
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Body:
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Exterior Body Panels, Interior Trim, Doors, Windows, Seats, HVAC System, Body Control Modules
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Electronics:
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Engine Control Module (ECM), Transmission Control Module (TCM), ABS Control Module, Airbag System (SRS), Body Control Module (BCM)
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Procedures Included
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Maintenance:
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Scheduled maintenance, fluid changes, filter replacements, lubrication
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Diagnostics:
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Troubleshooting charts, diagnostic trouble codes (DTCs), symptom analysis, wiring diagrams
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Repair:
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Component removal and installation, adjustments, overhaul procedures, component testing
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Calibration:
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Sensor calibration, control module programming (where applicable)
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Technical Specifications:
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Torque values, clearances, tolerances, resistance values, voltage specifications
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Technical Depth
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Depth:
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Comprehensive, covering from basic fluid checks to full engine and transmission rebuilds
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Diagnostic Tools:
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References to diagnostic scan tools and procedures specific to Audi VAG-COM (VCDS)
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Safety Features
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Ratings
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NHTSA Front Impact:
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4/5 Stars (Driver/Passenger - specific data for 1999 varies)
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IIHS Side Impact:
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Acceptable (typically for the era, check specific reports)
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Active Features
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ABS:
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Standard Anti-lock Braking System (ABS)
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Traction Control:
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Optional Electronic Stability Program (ESP) on some models
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Passive Features
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Airbags:
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Frontal airbags (driver & passenger), optional side airbags
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Seatbelts:
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3-point height-adjustable front seatbelts with pretensioners, rear seatbelts
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Rollover Protection:
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Reinforced body structure
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Maintenance
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Service Intervals Oil
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Engine Oil Change Interval:
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Typically 5,000-7,500 miles or 6-12 months, depending on driving conditions and oil type used (refer to manual for exact 'LongLife' or standard intervals).
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Service Intervals Filters
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Oil Filter Replacement:
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Replace with every oil change.
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Air Filter Replacement:
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Inspect every 15,000 miles, replace as needed (typically every 30,000 miles).
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Cabin Filter Replacement:
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Inspect every 15,000 miles, replace as needed (typically every 15,000-30,000 miles).
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Service Intervals Fluids
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Coolant Change Interval:
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Every 30,000 miles or 2 years.
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Brake Fluid Change Interval:
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Every 2 years, regardless of mileage.
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Transmission Fluid Change Interval Auto:
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Refer to manual; often 'lifetime' but recommended change every 60,000 miles for longevity. Specific G055005 or G052162 may be specified.
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Transmission Fluid Change Interval Manual:
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Refer to manual; typically at 60,000-100,000 miles. Specific G052171 or G052512 may be specified.
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Fluid Specifications
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Engine Oil Specification:
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SAE 5W-40 or 5W-30 synthetic oil, meeting VW 502 00 / 505 00 specifications. (Refer to manual for exact engine spec).
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Coolant Specification:
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G12 (Pink) Antifreeze/Coolant Concentrate diluted with distilled water.
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Brake Fluid Specification:
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DOT 4.
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Known Issues
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Common Issues Engine 1.8T:
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Coil pack failures, PCV system issues (oil leaks, rough idle), timing belt service critical (belt, tensioner, idlers), catalytic converter failure, sludge buildup if oil changes are neglected.
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Known Issues Engine V6
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Common Issues Engine V6:
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Timing chain tensioner guide wear (on some 30v V6 engines), oil cooler leaks, coolant flange leaks, spark plug well oil intrusion.
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Known Issues Chassis
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Common Issues Chassis:
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Suspension component wear (control arms, ball joints, tie rods), CV joint failure (especially on FWD), HVAC blower motor resistor failure, door lock module issues (central locking), pixelated instrument cluster displays.
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Known Issues Electrical
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Common Issues Electrical:
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Window regulator failures, headlight condensation, ABS/Traction control sensor issues.
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Vehicle History
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Brand Heritage
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Heritage:
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Audi, a German automotive manufacturer with a long history of engineering excellence, luxury, and innovation, particularly known for its quattro all-wheel-drive system.
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Model Evolution
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C5 Generation Introduction:
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The C5 generation A6 was introduced in 1997 (for the 1998 model year in some markets) and represented a significant redesign from its predecessor (C4). It featured a more aerodynamic, rounded design and a more sophisticated interior.
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1999 Model Year Updates:
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While the 1999 model year was part of the C5's early production, minor updates or package changes might have occurred. The introduction of the powerful 2.7T V6 engine was a key highlight of this generation.
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Production
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Manufacturing Location:
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Neckarsulm, Germany
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Production Years:
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1997-2004 (for C5 generation)
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