Hi,
I have made my self an AUX-input cable as it was easy to fabricate and soldier.
My Radio module is located in the trunk.
(I own a 2004 Euro spec 325ci Cabrio with Navi 16:9 screen).

I found Pins 3,4,10 to already have leads going into them, this means that the original PINs are available in the dash behind the screen module.
But i am using the aux for my CarPC, hence i took them out, and plugged my connectors in the black plug next to the white CD changer plug and had everything wired back to the radio unit.

i tried the PC, the sound is very low, I turn up the volume way too much to hear a moderate sound come out.
My question is:
isn't this amplified in the stock amp already?
is there a better way to connect my CarPC?
What would cause the radio module to not detect the AUX in?
soemtimes i feel it just doesn't see it, it flips over it just as the tape mode
does when there is no tape.

Thanks for your time

FK