Test 2
WARNING: This page does not describe the selected car, but rather 61 other vehicles, including the 1998 Audi Cabriolet, 1997 Audi Cabriolet, 1997 Audi A8, 1997 Audi A6, and 1997 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
For EGR function testing, see appropriate ENGINE PERFORMANCE section.