I have a Metra, it's much easier to install and this is not the question.
The new unit has a knob that I have to press if I want to take a call.
But because there is already a knob in the wheel, I would like to use it.
The same with the mic, if I could find the cable, I could use the build in insteat of adding a other one.
The Mic and the speak button are in addition to the interface.
They have separate connections.

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