Have just bought a 2nd hand Symphony to replace the Concert unit in my 2008 S3 Sportback (Bose sound system).
Installed OK and is running fine..much prefer having the 6 CD changer capability.
But the External Aux -In does not work and I think that there is a VCDS code setting that can be changed to activate it.
My local car-audio specialists have got a VCDS that they can plug in , but they don't know that code sttings needed.
Can anyone help please?