Manufacturer Model Note Year From Year To Headunit ConnectionAudi A2 Half Amplified Systems 2000 2005 Concert, Chorus, Symphony Mini ISOAudi A3 Half Amplified Systems 1996 2005 Concert, Chorus, Symphony Mini ISOAudi A4 Half Amplified Systems 1994 2005 Concert, Chorus, Symphony Mini ISOAudi A6 Half Amplified Systems 1994 2004 Concert, Chorus, Symphony Mini ISOAudi A8 Half Amplified Systems 1994 2002 Concert, Chorus, Symphony OEM Specific