... signal interfere, No battery required Audi A2 A4 A6 A8 S4 S6 S8 TT USB Interface MP3 Adapter(Mini ISO 8P ... 2003-2008 Spuerb 2003-2007 Octavia 2003-2008 Fabia Audi: 2000-2005 A2 1998-2006 A4/S4 1998-2004 ... 1,not work with Navi radio 2,not work with audi MMI system Alpha 5, Beta 5,Gamma 5,New Beetle ... 5Delco, RNS-MCD,Z6Z9(Phaeton), Z9Z7(New Beetle) etc Audi Chorus 1,Chorus 2, Concert 1, Concert 2, Symphony ...