A lesson to the wise - take your audio needs to a professional like Joe !!
After listening to others get un-nerved when looking at my old factory BMW radio where everything minus the FM stereo was obsolete, Joe's took what I call the professional approach and took a good look at it and gave me suggestions and options for the new aftermarket radio upgrade (with challenged instructions and diagrams) to working as designed.
Not only - did he get the new radio (and its accessories working, but was also able to get "ALL" the steering wheel functions to work as if it was a factory radio. I cannot thank Joe enough and for sure - would highly recommend and refer him as your first choice for audio work. Fair and Honest and Extremely Good to Great at what he does.