Highlights the use of a mechanical self-locking differential (similar to those in the RS4) to ensure immediate power delivery without waiting for sensors to react. Common Issues with the 0AQ System (Not in the PDF)

Best for DIY enthusiasts, mechanics, or owners who want to understand how their quattro system works.

Excellent. It provides detailed diagrams of the 0AQ transfer case, which was developed in collaboration with Borg-Warner .