it should all unpair as one unit.. although if the car had ECC (electronic climate) you would need to disable this from all of the modules, CID, CD70, UHP4... SPS flashing will wipe the unit which seems to be your best option at this stage of the game.
The other serial wires are only for the handset which had a base which attached to the armrest to replace the cupholders and isnt needed for the bluetooth functionality to work
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