I think the easiest route is to use one of those bluetooth FM transmitters that you then tune your radio into, I've got one for each of my cars and they work a treat as well as giving you a hands free function for the phone
only downside is the sound quality is not as good as direct line in
or as you say you can use the aux input via the 3.5mm jack or the USB
only downside is the sound quality is not as good as direct line in
or as you say you can use the aux input via the 3.5mm jack or the USB