Buenas noches con BimmerCode se activa el aux muy fácil , tienes que mirar esto y activarlos
Get the full version of the Bimmercode app
Get a supported Bluetooth OBD dongle
Connect to the car and navigate to the Headunit menu
Enable Expert/Advanced mode
Go into the "3000 HMI" folder
Scroll through the list of items (its very long) and find and set the following 3 items to "Aktiv" (some may alredy be "Aktiv"):
-- CDMM_AUX_HU -- CDMM_ANALOG_AUX -- CDMM_AUX_SIMPLE_1