RepairPal Certified shops can diagnose and repair your 2003 Audi Allroad Quattro. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
There is some kind of failure detected by a chassis module. You'll need an Audi compatible diagnostic tool that can test chassis modules and retrieve "C" codes. This will give you some clues as to where to start troubleshooting.