Hello. I have an Audi A4 2011 with (I think) a concert 3 radio. There are no pins for a cd changer in the back of the radio. Also I don't have any connections in the glovebox. I only have an aux port in the center compartment. Attached are pictures of the radio unit and the pin layout of the radio. I was wondering what are my options for bluetooth in this car because I have searched so much and not finding anything really. For example Connects2 ctaadbt004 bluetooth adapter doesn't work because my radio doesn't have the pins for the cd changer. I know about the aux to bluetooth adapters, but I would like to control the music from the radio units buttons. Thank you to anyone who can help me!