I just put a Pioneer AVH4100-NEX in my 2013 Altima SV. I lost my Push-To-Talk button on my steering wheel as well as the Hang Up button. In speaking with Metra there might be a way to assign these buttons again. But I was wondering if anyone has ever had any luck assigning these steering wheel button to control the microphone that activates Google Now when in Android Auto mode? Let me know.