I drive a 2011 Volkswagen GTI and have had a hard time figuring out how to access my playlists on my radio's iPod interface. My owner's manual doesn't discuss how to do this, and none of the descriptions I found online match my radio system. After some frustration and lots of button pushing, here's how to find your iPod playlists on a newer GTI:
1) Once a song is playing, hit the Menu button
2) Select Browse
3) Select Top
4) When Playlists appears, select Open
5) Your iPod's name will appear
6) Hit the Folder > button to access your first playlist
7) Hit the Category < button to find your other playlists
Enjoy the ride!