Show us what you have now in the center dash panel between the dash screen and climate controls and the center console. It's possible that your A5 came with a standard Concert (single CD) or Symphony (6-CD) radio, not MMI. The center console controls ONLY work with an MMI main unit. CAR functions are built into the Concert/Symphony radios, and aren't accessible from the MFSW. Did the previous owner include the original radio/head unit ? --g