I purchased the unit off Ebay you also need the amp, as long as the unit comes out of a Ford unless you want the Lincoln or Mercury flashscreen to show when the radio starts up. Model # doesn't matter, yes the wiring harnesses are the same for the 2008 thru 2010 models as long as both have factory navigation the unit plugs right in. I reprogrammed the unit myself both sync and steering wheel functions all work and I even installed a backup camera as seen in pictures. I first checked with our local Ford dealer and they told me it was not posible to do but it is posible if you know how to do it. You have to program the unit when it is installed in the vehicle.