When I got my bike I had the 12v installed and have a 12v dual USB port for charging my iPhone and plugging it in, since the DEALER stated the audio wire was for iPod integration. When I got home I read the manual and found the real iPod integration in the left bag.
Is it bad the sales staff do not even know what the are selling and where the features are located?! just saying...
Anyway I put in the 12v so it can work with other items too and the USB adapter when I need to charge something else.
BTW: the port in the bag works great with an iPhone and it charges it too!