Metra VWTO-01 2012-Up VW Fender System Interface Provides accessory (12 volt 10 amp) Retains R.A.P. (Retained Accessory Power) Provides NAV outputs (Parking Brake, Reverse, Mute, and V.S.S.) Prewired ASWC-1 harness (ASWC-1 sold separately) High level speaker input