CT20AU01 Audi ISO Harness Adapter 2005 OnwardsThis adapter will enable you to replace your factory fitted stereo with an after market unit. It converts the cars original wiring plug into a standard ISO connection for all new stereos. You simply plug one end of the adapter into your cars original wiring harness, and the other end into the new stereo, no cutting of wires is necessary.Suitable For: ? Audi A2 2005> ? Audi A3 2005> ? Audi A4 2005> ? Audi A6 2005> ? Audi A8 2005> ? Audi TT 2005> Fitted With: ? 40-Pin Fakra Connector ? Non Amplified