This comprehensive service and repair manual provides detailed instructions, diagrams, illustrations, wiring schematics, and specifications for maintaining, servicing, diagnosing and repairing your 2004 Audi A4 Cabriolet 8H, 8H7, 8HE. It’s the same manual used by technicians at Audi dealerships, ensuring you have access to the most accurate and up-to-date information.

The manual covers all aspects of your vehicle, including:

* **Maintenance:** Routine maintenance schedules, fluid capacities, and recommended parts.
* **Engine:** Detailed information on engine operation, troubleshooting, and repair procedures.
* **Control System:** Diagnosis and repair of electronic control systems, including engine management, transmission, and ABS.
* **Mechanical:** In-depth coverage of mechanical components, such as the suspension, brakes, steering, and drivetrain.
* **Fuel Service Specifications:** Technical details on fuel system components, including injectors, pumps, and lines.
* **Emission Control:** Information on emission control systems, diagnosing and repairing emissions-related issues.
* **Intake Exhaust Cooling:** Detailed information on the intake and exhaust systems, including cooling components.
* **Lube:** Guidance on lubrication procedures and recommended lubricants for specific components.
* **Ignition Starting Charging:** Comprehensive instructions on diagnosing and repairing the ignition, starting, and charging systems.
* **Auto Transmission Clutch:** Detailed information on automatic transmissions, including clutch operation and repair.
* **Manual Transmission:** Instructions on diagnosing and repairing manual transmissions.
* **Transfer Propeller Shaft:** Information on transfer cases, propeller shafts, and related components.
* **Drive Shaft:** Instructions on diagnosing and repairing drive shafts.
* **Differential:** Coverage of differential operation and repair.
* **Axle Suspension:** Detailed information on axles, suspension components, and repair procedures.
* **Tire & Wheel:** Guidance on tire selection, maintenance, and wheel repair.
* **Brake Control:** Detailed information on brake control systems, including ABS and electronic stability control.
* **Brake:** Comprehensive instructions on diagnosing and repairing brake systems.
* **Parking Brake:** Information on parking brake operation and repair.
* **Steering Column:** Details on steering column components and repair procedures.
* **Power Steering:** Coverage of power steering systems, including diagnosing and repairing units.
* **Air Condition:** Instructions on diagnosing and repairing air conditioning systems.
* **Suppl Restraint System:** Information on supplementary restraint systems, including airbags and seatbelt pretensioners.
* **Seat Belt:** Detailed information on seatbelt systems, including operation and repair.
* **Engine Immobilizer:** Instructions on diagnosing and repairing engine immobilizer systems.
* **Cruise Control:** Coverage of cruise control systems, including operation and repair.
* **Wiper & Washer:** Information on windshield wiper and washer systems, including operation and repair.
* **Door Lock:** Instructions on diagnosing and repairing door locks.
* **Meter Audio/Visual:** Information on instrument panel gauges, audio systems, and other visual displays.
* **Horn:** Instructions on diagnosing and repairing the horn.
* **Windshield/Glass Mirror:** Information on windshield, glass, and mirror replacement.
* **Instrument Panel:** Guidance on instrument panel components and repair procedures.
* **Seat:** Detailed information on seat systems, including operation, adjustment, and repair.
* **Engine Hood/Door:** Instructions on engine hood and door operation and repair.
* **Exterior & Interior:** Information on exterior and interior components, including trim, body panels, and upholstery.
* **Electrical:** Comprehensive coverage of electrical systems, including wiring diagrams and troubleshooting procedures.
* **Multiplex/Can Communication:** Information on multiplex and CAN communication systems, essential for understanding modern vehicle electronics.

This comprehensive manual empowers you to confidently tackle any repair or maintenance task on your 2004 Audi A4 Cabriolet. You'll have the knowledge and tools to perform repairs yourself, saving you time and money.

The 2004 Audi A4 Cabriolet, designated as the 8H, 8H7, or 8HE model, is a sophisticated and sporty convertible that embodies the German automaker's reputation for luxury and performance. This iteration of the A4 Cabriolet, introduced in 2002, was the second generation of the model and marked a significant evolution from its predecessor. It featured a refined and elegant design, with a flowing roofline that seamlessly blended into the rear deck. The Cabriolet offered a spacious and well-appointed interior, featuring premium materials and a driver-focused cockpit. Its retractable soft top provided a truly open-air experience, allowing passengers to enjoy the thrill of driving with the wind in their hair.

Under the hood, the 2004 A4 Cabriolet offered a range of powerful and efficient engine options, including a 1.8-liter turbocharged four-cylinder engine, a 2.0-liter naturally aspirated four-cylinder engine, and a 3.0-liter V6 engine. These engines were paired with either a six-speed manual or a five-speed automatic transmission, providing smooth and responsive performance. The A4 Cabriolet also boasted a well-engineered suspension system that delivered a balanced blend of comfort and handling prowess. Its advanced safety features, such as anti-lock brakes, electronic stability control, and multiple airbags, provided peace of mind for both the driver and passengers. The 2004 Audi A4 Cabriolet truly epitomized the brand's commitment to creating stylish, powerful, and sophisticated vehicles, offering a compelling combination of luxury, performance, and practicality.