I called a parts dealer for my car and I can buy the steering wheel controls with the answer/end buttons and voice control button then install that in my car rather easily. My concern is that these SWC were not compatible with my factory radio. Are the answer/end call and voice button compatible with the NEX4000 using the Metra steering wheel controls unit?
Also, if I do buy these controls, will the voice button work to launch Siri if i'm in CarPlay? What about if i'm connected using Bluetooth?