iPod and iPhone personal hotspot question

In my Audi, I have a wire in the glove box that connects to my ipod nano, or sometimes my iphone, but I like to keep my phone on me so most of the time its the nano.

I use iTunes alot to download music, the nano doesnt have wifi so this isnt an option but i was wondering, if I had a iPod Touch permanently in my glove box, connected to the car, and kept my phones personal hotspot always on, so that the Touch could be connected to wifi all the time, would it auto download my new purchases? I mean when i connect my ipad to my iphone using the personal hotspot the wifi symbol is different, it looks more like a lock. Does anyone know if it would auto download my songs over this connection? Has anyone tried this?

Thanks a bunch