1998-1999 AUDI A6 Workshop Service Repair Manual

🏷️ Basic Information

Make:

Audi

Model:

A6

Model Generation:

C5

Model Years Covered:

1998, 1999

Chassis Codes:

4B

Body Styles:

Sedan and Avant (Wagon)

Drivetrain Options:

Front-wheel drive (FWD) and quattro all-wheel drive

👋 Introduction

Vehicle Class:

Executive/Luxury Mid-size Sedan and Avant (Wagon).

Target Audience:

Premium buyers seeking German engineering, all-weather capability, and refinement.

Key Competitors:

BMW 5 Series (E39), Mercedes-Benz E-Class (W210), Volvo S80, Lexus GS.

Competitive Advantage:

Quattro all-wheel-drive availability and strong value versus rear-wheel-drive German rivals.

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 Overview:

Comprehensive repair and service procedures for all aspects of the 1998-1999 Audi A6.

Manual Type:

Workshop Service Repair Manual

Language:

English

Estimated Page Count:

1500+

Format:

PDF

Delivery Method:

Instant digital download

File Type:

Single PDF file with bookmarks and search functionality.

Print Quality:

High-resolution digital reproduction suitable for printing.

Binding Type:

N/A - digital PDF

Paper Type:

N/A - digital PDF

📖 Manual Coverage

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.

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 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.

Torque Specifications:

Factory torque values provided for fasteners throughout all procedures.

Parts Information:

Part numbers, specifications, and exploded-view component diagrams included.

📊 Manual Specifications

File Format:

PDF (searchable, bookmarked, zoomable)

Compatibility:

Windows, macOS, Linux, iOS, and Android — any device with a PDF reader

Requirements:

A PDF reader application (e.g. Adobe Acrobat Reader, free)

Searchability:

Fully text searchable for fast lookup of any topic

Print Quality:

High-resolution digital pages, printable at full clarity

Binding Type:

N/A — digital download, no physical binding

Paper Type:

N/A — digital download, no physical paper

⚙️ Engine Specifications

Engine Options:

2.8L V6 (ACK, AHA), 2.4L V6 (ALW, APC), 2.5L V6 TDI (AKE, AYM), 4.2L V8 (ASG).

2.8L V6 Horsepower:

190 hp @ 6000 rpm

2.8L V6 Torque:

206 lb-ft @ 3200 rpm

4.2L V8 Horsepower:

Approximately 300 hp (ASG engine, where fitted)

Fuel Delivery:

Multi-point Fuel Injection (MPI)

Fuel Requirement:

Premium unleaded recommended for gasoline engines.

Engine Control Unit:

Bosch Motronic (specific versions vary by engine code)

Timing Belt Replacement Interval:

Refer to manual for specific engine code; generally 60,000-80,000 miles or 5 years.

🔧 Transmission

Standard Transmission Type:

5-speed Manual (01A)

Optional Transmission Type:

5-speed Tiptronic Automatic (01V)

Transmission Fluid Type:

G 052 911 A1/A2 for manual; G 052 990 A2 for automatic (check manual for exact spec)

Final Drive:

Integrated with transaxle; ratios vary by engine and drivetrain configuration.

AWD System Type:

Torsen T-3 Center Differential (mechanical, self-locking)

📐 Dimensions

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)

Curb Weight Approx:

1500 - 1700 kg (3307 - 3748 lbs) depending on configuration

Towing Capacity:

Refer to vehicle specific documentation or manual.

🛡️ Safety Features

NHTSA Front Impact Rating:

Not readily available for this specific year/model from NHTSA public records, but generally considered safe for its era.

ABS:

Standard Anti-lock Braking System (ABS).

Ebd:

Electronic Brake-force Distribution (EBD) often integrated with ABS.

Airbags:

Driver and front passenger airbags; optional side airbags.

Seatbelts:

Pretensioning front seatbelts.

Body Structure:

Reinforced passenger cell with programmed crumple zones front and rear.

💡 Technology Features

Radio Options:

Audi Concert, Audi Symphony (CD player, cassette, optional navigation system).

Speaker Systems:

Standard 8-speaker system, Bose premium sound system available.

Cruise Control:

Standard cruise control system.

Parking Assistance:

Rear parking sensors were an available option on some models.

Onboard Computer:

Driver information system (DIS) displaying fuel economy, range, and trip data.

🔧 Maintenance

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.

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

Common Issues List:

Ignition coil failure, coolant flange leaks (plastic), PCV valve issues, door lock actuator failure, window regulator problems, certain transmission control module (TCM) issues in automatics.

Suspension Wear:

Front control arm bushings and ball joints can wear over time, leading to clunking noises and alignment issues.

📚 Vehicle History

Manufacturer:

Audi AG (part of the Volkswagen Group)

Brand Focus:

Audi, a German manufacturer with a long history of engineering innovation, particularly in quattro all-wheel-drive and diesel engines.

C5 Introduction:

The C5 generation A6 replaced the C4 generation. It marked a significant step forward in design, technology, and platform architecture.

Platform Sharing:

Built on the Volkswagen Group PL45 platform, shared with the VW Passat B5.

Manufacturing Location:

Germany

Production Years:

1998, 1999 (covered by this manual)

🏆 Awards & Recognition

Car And Driver Best:

Car and Driver recognized the Audi A6 as one of the 10Best cars for 1998.

Industry Reputation:

Widely regarded as a benchmark for interior quality and all-weather capability in its class.