Metra AX-ADXSVI-SP1 07-Up Sprinter XSVI Harness Provides accessory (12 volt 10 amp) Retains R.A.P. (retained accessory power) Provides NAV outputs (parking brake, reverse, and V.S.S.) Prewired ASWC-1 harness included (ASWC-1 sold separately) High level speaker input