There is no AUX on CNI2.
If you want to add it, you have to remove 6-CD charger, and replace it by a charger emulator. As AudioConnexionBox or Xcarlink.
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Megane 3 TCE
Scenic 3 DCI
Kangoo 3 TCE
https://j2c.org
Planète Renault, on y vient pour l'info, on y reste pour les potos