XSVI-9005-NAV Wiring Interface -Allows you to connect a new car stereo in select 2005-11 Mercedes-Benz vehicles Provides accessory (12 volt 10 amp) Retains R.A.P. (Retained Accessory Power) Used in non-amplified systems or when replacing amplified system Provides NAV outputs (Parking Brake, Reverse, and V.S.S.) Prewired ASWC-1 harness included (ASWC-1 sold separately)