« Reply #1 on: 16 February 2015, 08:06 »
Looking at this the RCD310 does accept the microphone
http://www.my-gti.com/1319/volkswagen-rcd-310-pin-assignments.
I think there is two ways to wire the microphone, one is to pass it through the head unit and the other is to bypass it straight into the Bluetooth module. There may be some coding required for one or the other. Does the button on the steering wheel just mute the radio? or does it activate the voice?
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