Thanks ! for the illuminated knob :
www.gearknob.de .
Is a little German factory but for Audi you can find a lot of different designs .
This company is without stock ; when you pay they work on your knob and in one week is ready to delivered .
The installation job is easy (10/15 minutes), and the lighter on the central tunnel is a good point for board 12v connection .
The effect in the cockpit is great !
P.S. : sorry for my uncorrect english ...