While there are 3 possible configurations for your SEL (standard 6 disc with 4 speakers, SYNC added, or navigation premium sound with 9 speakers), SYNC can require a hard reset, which is done either by removing the fuse (#3 under the dash), the radio (fuse 28), I haven't had a vehicle with stand alone satellite module (fuse #13), or pulling the negative battery cable.
I don't know how accessible the fuse panel in yours is, but in my 2012 Fusion, it is easier to pull the battery cable (for ~20 seconds, and turning on the headlights to be sure to discharge power, often if I don't do that, it will not reset, and I can tell because I don't lose time or radio presets).
If it has never worked, as suggested, a master reset would also be a good idea. Get rid of the previous owners phones (if it has SYNC/Navigation), do you have a Sirius/XM account? Are you expecting it to work, or hope it has lifetime, or the previous owner left their account active?