I've got a 12v power doohicky that has three USB outlets on it. One feeds the iPod. The iPod feeds the AUX from the headphone jack. I'm happy because the podcasts play in the right (chronological) order now, and quit when they reach the end of the last one, instead of starting alllllll over again. That SoundCheck works, crossfade works, and I can use the on the fly Genius playlists again is just gravy for me. Plus, I'm all set for when the iPod gets upgraded, since iPod Touch doesn't seem to be supported on a 2012. USB thumb drive can live in the USB port too.I have a 2013 and the Bluetooth streaming sucks. It doesn't connect reliably, and when it is working the audio quality is poor. The USB iPhone connection sucks too; it takes forever to perform some sync tasks when I plug my phone in before I can use it.
I am trying to figure out an alternate solution. My current plan is to lobotomize an Apple iPhone dock so I can use one cable for charging and audio, to feed the aux input.