Spotify via USB in the car/ problems via Android

[namenlose]

Hi,  

if I connect the iphone with the USB port in my car it works. I can handle my playlist by using the radio screen and my car plays the music. if I connect my Android (5.0.2) mobile with the USB it does not work. No Spotify Playlist available. Only mp3-files that are on my mobile. I have to handly everything through the phone not by using the radio screen.

Does anybody know a solution for tat? Thank you very much.