Metra Electronics 70-1776 Radio Harness For Models w/Factory NAV And w/o THX Plugs In To Car Harness At Radio Location Radio Harness Retains OE Subwoofer Amplifier Retains Rear Seat Entertainment Retains NAV Wires  VSS and Reverse Retains SWC Control Wire (grey/red) Compatible With: Ford Escape Hybrid 2006-2007 with OE Navigation, Ford Expedition 2003-2006 with OE Navigation, Lincoln Navigator 2003-2006 with OE Navigation without THX Amplifiers, Mercury Mariner Hybrid 2006-2007 with OE Navigation