2012 C4 Picasso - Change Stereo Headunit to add Bluetooth

[GiveMeABreak]

This is just from what I have looked up and the harnesses are very equipment and build date specific. It's another reason why Citroen do not sell the factory-fitted Nomad hands free kit as an official accessory, but only provide approved aftermarket systems, because they have to be fitted at factory with the requisite harness and other conenctions.

[antonioprm]

While you're stuck with the FM, try either 87.5 or 107.9, those are bound to be the frequencies with the least interferences.
Possibly unscrewing = removing the antenna will also make it that regular stations are more difficult to pick up, whereas the transmitter is close enough for that not to matter.

[xantia_v6]

The wiring may be present for a retrofit (it was on our 308), but Marc is correct on the need to reprogram and the need to fit a microphone.