RKX MMI 2g control panel (E380).
This part fits: A6 2005-2009 MMI 2g High
Q7 2007-2009 MMI 2g High
This is the control module / circuit board that sits directly below all of the radio buttons and knobs. This part is prone to failure especially from liquid damage as it sits near the cup holders.
Problems can range from LED backlights not working, buttons sticking or inoperative, or completely non functional.
Please look at the pictures carefully to help determine compatibility. Audi uses several different part numbers, but the control board is the same if the exterior controls look like the ones in the pictures.