BimmerGeeks came back to me:
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Q: My car is BMW E71 with CCC.
Are those coding options applicable to my car?
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A: Does not appear that the CCC modules have those same corresponding options, the check was based on CIC headunit.
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I conclude that the MUTE_PIN cannot be programmed with CCC.
So I am concentrating my efforts on the mute wires I soldered on the volume encoder. I am building a circuit involving a relay and a "one shot/monostable multivibrator" so that when the trigger goes to ground, the relay can momentarily join the 2 pins on the encoder.
If anyone is good with electronics, I have opened this thread here or chime in below please:
https://forum.allaboutcircuits.com/t...d-unit.199642/