1. If there is any inappropriate play in the steering gear causing noise or rattling, the steering gear must be adjusted as follows. An assistant is required for this.
2. Turn the steering wheel approximately 30° either side of the center position. The front wheels should finally be pointing straight ahead.
3. Loosen the adjustment screw at the top of the steering gear until there is significant play and the rack movement can be heard from inside the car (photo).
4. Slowly tighten the adjustment screw until the rack movement can no longer be heard inside the vehicle. If the adjustment screw has a lock nut, check that it is tightened after adjustment. Also check that the cover bolts are tightened.
5. Turn the steering from lock to lock and make sure there are no "tight" spots.
(The original text is available on the website AudiManual.ru)