heres the image you can use if you want the original psd give me your email you can tweak it then Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Where did you route the iphone cable? Also, you mentioned you were getting no sound? What did you have to modify? From my understanding, there is a USB dongle that you plug into the back of the Eonon unit and then you plug your iphone cable into that dongle.

I got an extra long usb extension from the head unit to the armrest box and put it all in there.

Yes you need a resler interface and an ibus app can’t remember the name off the top of my head but it lets you code the amp to stay on and use steering controls properly Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Do you have dsp? You may need to run a set of rca from either front or rear outs to the dsp in Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF