Looking to install an AUX port into my girlfriend’s 2007 Audi A4 in the next few weeks. From what I hear you need special tools to remove the radio and the ECU needs to be recoded with VAGCOM to recognize the AUX input. Just need to borrow the wrenches and if you have VAGCOM, I’d love it if you could recode it for me.
Google’d it and found this to be the ones….(I think)