Was at my local dealer today, had been told in the past that I did not have the proper equipment for DRL.
Called other dealers and was given the same spiel. (09 Lincoln MKX).
Anyway, while checking in for a door lock problem (turned out it was frozen), I asked to also have my DRL turned on. They told me they could not do that and I handed them copies of pages from the Ford service manual showing the procedure. They looked surprised and said OK.
$45 later and now I have DRL's.
According to the manual, DRL's are controlled through the smart junction box (also known as the Generic Electronic Module). Procedure is for the dealer to connect his Vehicle Communication Module with the correct Integrated Diagnostic System (software) and simply set a flag to on, under the DRL section. When the DRL is active, the smart junction box provides a " Pulse Width Modulated" voltage to the low beam headlamps. This illuminates the headlamps at a reduced intensity.
Should be able to have your DRL turned on, on any year of MKX. (Probably any Lincoln or Ford as well).