So recently I bought an alpine w407-EBT head unit. And also bought a ktp 445 power pack. (Amp you add to the alpine head unit ).
I had to buy the canbus adapter for the steering wheel controls.
For some odd reason only the front speakers are working through the head unit, and the rear speakers are still running off the factory amplifier.
My alpine dealer who installs it, is blaming it on the canbus unit and saying that there is nothing I can do about it, unless I rewire the audio directly to the head unit. But then I will lose steering wheel controls :(!
Any suggestions on how to solve this?
THis is all on an 05 Audi a3 quattro 2.0T