We've got a new entry on the "Known issues" list for Android Auto, and it's an interesting one. We've been discussing the Moto G 2015 and Android Auto in our AA forums. Some folks (mainly, me) have been able to get it to work. But others haven't. And today, Google's dropped the following:

Android Auto doesn't start on the Moto G. We're working with Motorola on a solution.

We're assuming they're talking about the new Moto G. So the bad news is something doesn't work for folks. The good news is other folks are on it. Stay tuned, Moto G fans!

Source: Android Auto known issues