At a glance
What can fail
The rear outboard seat belts have defective automatic locking retractors that may not properly secure a child seat. The lower universal anchorage system is not affected.
What the fix does
Audi will mail you instructions to visit a dealership, where technicians will inspect and replace the rear outboard seat belts if needed.
Summarized — see the official notice for exact wording, dates, and contacts.