I have had my 2015 Z for 2 months. Love the car. Fits me perfectly. I’m not real high tech but I got my i phone paired up and it works good but my navigation screen controls seem to be not working properly. Sometimes the voice activation does what I tell it to and sometimes it says a command was not heard bla bla bla. Manually putting in an address is impossible. I get part of the house # in and it gives me no choices that are correct. There are other things about it that I just cannot figure out and no I have not read a lot in the manual about it. I took it to the Honda dealer here and they had a couple guys that sorta know about it but no one could tell me definitely how things worked. They can do a diagnosis on the system for $80. Is that something I should look into to make sure the system itself is working?