Market Segment:
Mid-size luxury sedan
Key Competitors:
BMW 5 Series, Mercedes-Benz E-Class, Lexus GS, Jaguar S-Type
Platform:
Volkswagen Group PL45 platform (shared with some Volkswagen models)
Design Philosophy:
Elegant styling, advanced technology, comfortable ride, and strong performance, characteristic of Audi's design language.
Engine Mechanical:
Detailed disassembly, inspection, repair, and reassembly procedures for all engine variants offered in 1998.
Engine Management:
Ignition system, fuel injection system, emissions control, diagnostic trouble codes (DTCs), sensor data, ECU operation.
Transmission Manual:
Repair and overhaul of manual transmissions.
Transmission Automatic:
Repair, diagnosis, and fluid service for automatic transmissions (e.g., Tiptronic).
Drivetrain AWD:
Service and diagnosis for quattro all-wheel-drive system, including differentials and driveshafts.
Suspension:
Front and rear suspension systems, components (shocks, struts, control arms, bushings), alignment specifications.
Steering:
Power steering system diagnosis, repair, components (rack and pinion, pump), fluid specifications.
Brakes:
Disc brake systems (front and rear), ABS, EBD, brake fluid specifications, caliper and rotor service, parking brake.
Electrical System:
Complete wiring diagrams, component locations, fuses, relays, lighting systems, starter, alternator.
Body Exterior:
Panel removal and installation, trim, bumpers, glass replacement, door mechanisms, sunroof.
Body Interior:
Dashboard, seats, upholstery, HVAC controls, interior trim, airbag system service precautions.
HVAC:
Heating, ventilation, and air conditioning system diagnosis, refrigerant handling, component replacement.
Safety Systems:
Airbag system service, seatbelt mechanisms, child seat anchor points.
Routine Maintenance:
Oil changes, filter replacements, spark plug service, coolant flushes, brake fluid changes, belt inspections.
Diagnostic Procedures:
Troubleshooting guides for common drivability issues, electrical faults, and mechanical problems.
Repair Procedures:
Step-by-step instructions for component removal, repair, and reinstallation across all major vehicle systems.
Assembly Disassembly:
Detailed instructions for the removal and installation of major components and sub-assemblies.
Cleaning Lubrication:
Guidelines for cleaning components and applying appropriate lubricants during service.
Depth Of Coverage:
Comprehensive. Covers everything from basic maintenance to complete engine and transmission overhauls, electrical system diagnosis, and bodywork.
Engine Options:
2.8L V6 (AFP, ACK, ALG), 4.2L V8 (AQD, ARS, ART)
2.8L V6 Horsepower:
190 hp @ 5800 rpm
2.8L V6 Torque:
206 lb-ft @ 3200 rpm
4.2L V8 Horsepower:
300 hp @ 6000 rpm
4.2L V8 Torque:
295 lb-ft @ 3200 rpm
Fuel Delivery:
Multi-port Fuel Injection (MPI)
Ignition Type:
Distributorless Ignition System (DIS) with coil-on-plug or coil packs depending on engine variant.
Valve Train:
24-valve DOHC (2.8L V6), 32-valve DOHC (4.2L V8)
Oil Change Interval:
Typically every 7,500 - 10,000 miles (12,000 - 16,000 km) or annually, depending on driving conditions and oil type.
Timing Belt Replacement:
For 2.8L V6 engines, typically around 105,000 miles (168,000 km). The 4.2L V8 utilizes a timing chain system.
Engine Oil Type:
SAE 0W-40 or 5W-40 synthetic oil meeting VW 502 00 specification.
Coolant Type:
G12 or G12+ ethylene glycol coolant (purple or pink) mixed 50/50 with distilled water.
Automatic Transmission Fluid:
G 052 162 (LT 71141) or equivalent for Tiptronic transmissions.
Common Problems:
Leaking valve cover gaskets, coolant flange leaks, ignition coil failures, ABS sensor failures, camshaft adjuster leaks (2.8L V6), suspension component wear (control arm bushings).
