🏷️ Basic Information Identification Make: Audi Model: A6 Model Generation: C5 Model Years Covered: 1998, 1999 Chassis Codes: 4B 👋 Introduction Market Position Vehicle Class: Executive/Luxury Mid-size Sedan and Avant (Wagon). Competitive Analysis Key Competitors: BMW 5 Series (E39), Mercedes-Benz E-Class (W210), Volvo S80, Lexus GS. Key Features Platform Design: Introduction of the C5 platform, shared with the VW Passat B5, featuring a refined chassis and improved aerodynamics. Quattro AWD: Availability of the legendary quattro all-wheel-drive system, enhancing traction and stability. Premium Interior: High-quality materials, ergonomic design, and advanced features for a luxurious cabin experience. 📋 Manual Details Coverage Areas Coverage Overview: Comprehensive repair and service procedures for all aspects of the 1998-1999 Audi A6. Page Count Estimated Page Count: 1500+ Manual Type Manual Type: Workshop Service Repair Manual Language Language: English Format Format: PDF File Type: Single PDF file with bookmarks and search functionality. Print Quality Print Quality: High-resolution digital reproduction suitable for printing. Binding Type Binding Type: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) 📖 Manual Coverage Systems Covered Engine Systems: Engine mechanical, lubrication, cooling, fuel delivery, ignition, emissions, engine management. Transmission Systems: Manual and automatic transmission service, overhaul, diagnosis, and control systems. Drivetrain Systems: Front-wheel drive, quattro all-wheel drive, drive shafts, CV joints, differentials. Suspension Systems: Front and rear suspension components, alignment, shock absorbers, springs, control arms. Braking Systems: Front and rear brakes, ABS, EBD, brake fluid, calipers, rotors, pads, lines. Steering Systems: Power steering system, steering rack, column, linkages. Electrical Systems: Battery, charging system, starting system, lighting, instrument panel, power windows, mirrors. Climate Control Systems: Air conditioning, heating, ventilation, HVAC controls, refrigerant system. Safety Systems: Airbags, seat belts, SRS system diagnosis. Body And Interior: Body panels, doors, glass, interior trim, seats, convertible top (if applicable). Diagnostics And Troubleshooting: Diagnostic trouble codes (DTCs), fault finding, component testing. Procedures Included Maintenance Procedures: Oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt tensioning. Repair Procedures: Engine rebuild, transmission overhaul, brake caliper replacement, suspension component replacement, starter motor replacement. Diagnostic Procedures: Testing electrical circuits, diagnosing engine performance issues, checking for fuel system leaks. Wiring Schematics: Detailed electrical wiring diagrams for all major systems. Special Tools: Identification and usage of specialized tools required for specific repairs. Technical Depth Technical Depth Level: Extremely high: from basic maintenance to complete component rebuilds and complex diagnostics. Diagnostic Code Coverage: Comprehensive coverage of OBD-II diagnostic trouble codes and their interpretations. Diagram Quality: Detailed, clear illustrations and diagrams for all procedures. ⚙️ Engine Specifications Primary Engine Engine Options: 2.8L V6 (ACK, AHA), 2.4L V6 (ALW, APC), 2.5L V6 TDI (AKE, AYM), 4.2L V8 (ASG). Performance 2.8L V6 Horsepower: 190 hp @ 6000 rpm 2.8L V6 Torque: 206 lb-ft @ 3200 rpm Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) Engine Management Engine Control Unit: Bosch Motronic (specific versions vary by engine code) Maintenance Timing Belt Replacement Interval: Refer to manual for specific engine code; generally 60,000-80,000 miles or 5 years. 🔧 Transmission Standard Transmission Standard Transmission Type: 5-speed Manual (01A) Optional Transmission Optional Transmission Type: 5-speed Tiptronic Automatic (01V) Features Transmission Fluid Type: G 052 911 A1/A2 for manual; G 052 990 A2 for automatic (check manual for exact spec) Quattro System AWD System Type: Torsen T-3 Center Differential (mechanical, self-locking) 📐 Dimensions Exterior Wheelbase Sedan: 2760 mm (108.7 in) Length Sedan: 4797 mm (188.9 in) Width Sedan: 1764 mm (69.4 in) Height Sedan: 1445 mm (56.9 in) Weights Curb Weight Approx: 1500 - 1700 kg (3307 - 3748 lbs) depending on configuration Towing Capacity: Refer to vehicle specific documentation or manual. 🛡️ Safety Features Ratings NHTSA Front Impact Rating: Not readily available for this specific year/model from NHTSA public records, but generally considered safe for its era. Active Features ABS: Standard Anti-lock Braking System (ABS). Ebd: Electronic Brake-force Distribution (EBD) often integrated with ABS. Passive Features Airbags: Driver and front passenger airbags; optional side airbags. Seatbelts: Pretensioning front seatbelts. 💡 Technology Features Infotainment Radio Options: Audi Concert, Audi Symphony (CD player, cassette, optional navigation system). Speaker Systems: Standard 8-speaker system, Bose premium sound system available. Driver Assistance Cruise Control: Standard cruise control system. Parking Assistance: Rear parking sensors were an available option on some models. Connectivity Onboard Computer: Driver information system (DIS) displaying fuel economy, range, and trip data. 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500 miles or 12 months, whichever comes first (synthetic oil recommended). Cabin Air Filter Replacement: Every 15,000 miles or 12 months. Fluid Specifications Engine Oil Specification: SAE 5W-40 Synthetic (VW 502 00 / 505 00 approval recommended for gasoline engines) Coolant Specification: G 12 or G 12+ Pink Antifreeze/Coolant (50/50 mix with distilled water) Brake Fluid Specification: DOT 4 Known Issues Common Issues List: Ignition coil failure, coolant flange leaks (plastic), PCV valve issues, door lock actuator failure, window regulator problems, certain...