Knob & Avon Tires
 

The plastic knob that is used to scroll thru the nav. menu broke. The stem it sits on is fine. This is a minor item, but I wondered if the Audi dealer is the best source to get a replacement or are there other places to go? (2001 A8 L Silver). Just purchased 4 18" Avon Tech tires. I hope they live up to the reviews on Tire Rack. With only 300 miles they are so much better than the Dunlop 8000's