Yellow warning light - never seen this one
 

I have google searched and looked at Audi forums and I can not find a match to this symbol?

I have a 2006 Audi S4 convertible - 4.2L V8

Car seems to run fine. While driving, after about 15 minutes, a quick beep sounds and this yellow symbol appears.

Here is the image.

https://cimg6.ibsrv.net/gimg/www.aud...995e3aa778.jpg

Looks like a flat tire, but post your question here:

S4 (B6 & B7 Platforms) Discussion - AudiWorld Forums

whoops...sorry I did post in the wrong place. I will repost