The interface with the iPhone 6s for SMS isn't very good, as above if I turn on the notification sharing in the phone then any new unread SMS can be read on the screen in the car but it's only picking up the notification, it does not access the inbox or sent items so it has very little value unfortunately.

 

The best phone I had for this was actually a Nokia Lumia Windows phone, all SMS was read aloud and it asked you over the hands free if you wanted to read/ignore/reply and you could dictate and send instant replies. Apple seem to not offer this (unless it's a feature of Apple Car Play??)

Bit of a bump on this topic; I've got a new phone, iPhone 5s; it reads texts out but I cannot reply like my old 5c could - is there a quick fix for this?

TIA