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EBTOOLS Bluetooth Aux Audio Adapter Car Radio RD4 Stereo Aux-In Audio Cable Adapter Replacement for Citroen C2 C3 C4 C5 C6 C8 for Peugeot 207 307 308 407 607 807 1007 4007 : Amazon.de: Electronics & Photo
Citroen C4 Picasso car stereo MP3 CD player Citroen RD4 radio + FREE Vin Code | eBay
RD4 CITROEN C2 C3 C4 C5 C6 DS3 DS4 RD4 CAR RADIO MP3 AUDIO AUXILIARY JACK CABLE | eBay
Play&Plug Car Radio RD4 Bluetooth 5.0 AUX-IN Audio Adapter Harness Cable Microphone Handsfree Wiring for Citroen C2 C5 - AliExpress
Install Audio AUX Cable and activate with Diagbox (PP2000 or Lexia) on Peugeot Citroen RD4 Radio CD - YouTube
Cavo Audio Bluetooth, 12 Pin Autoradio RD4 Bluetooth Musica Aux Cavo Adattatore Adattatore di Ricambio per Citroen C2 C3 C4 C5 C6 C8(Con microfono) : Amazon.it: Elettronica
Car Audio Bluetooth 5.0 Receiver Aux Adapter for Peugeot Citroen C2 C5 RD45 RD4 Radio Module Bluetooth Aux Cable - AliExpress