Today I followed the excellent guide on here, and fitted my OEM bluetooth kit.
I've managed to code it and got all the functions on the RCD510 and MFSW to work as they should, but no one can hear me. When in the Phone Menu of the RCD510, I press "Extras" and at the top of the list it that comes up, it says "Microphone off". Can anyone please help me turn the "Microphone on"?