We are going to look at a new Vauxhall Mokka X, It's another thing I will ask about when I go for a test drive.
I have a Vauxhall. It interacts with my phone over bluetooth or usb.
This is the official video for Apple Support but theres also an app for Android.
[youtube]https://www.youtube.com/watch?v=-GVb5MWyqr4[/youtube]
PS I notice on there it says connect your phone by USB.
On mine most of the android phone functions are available via bluetooth, so it just autoconnects when I get in the car without me having to do anything and I keep my phone in my handbag.
I think maps and any personal music stored on your phone need usb though.