Save yourself a lot of time and stop looking. That iPod integration is done with proprietary communications that only exist on the iPod.
There are some systems that use a BlueTooth link and most phones will play along with either nothing or a matching app.
I recently got a 2010 Nissan Sentra and it has one of the docks in the center console where you plug in your iPod and then on the stereo there is an iPod button/feature so you can run through songs, albums, playlists, etc. in your car.
I really don't want an iPod, but would like to buy an mp3 player and use the iPod features that are on there car.
Can someone help me out on getting an mp3 player that will not only work like an iPod when I listen to it in my car (control it through the stereo) but also an adapter so I can get the mp3 player connected to that dock.
Any help would be appreciated. I'm sure there is a way that I can do this without actually buying an iPod.