Parrot PC000016AA adapter for hands-free kits Compatible Peugeot / Citroën (Accessory)
It is an expensive product for what it is (and some electrical sockets son), but it has the merit of work. On my Peugeot 207, I can actually reverse the son of 12V and 12V permanent, you need to know (a bit of research on the net and found) and once