You learn something from MB everytime:
Of course you wonder what a big-ass M134 minigun does in a SUV. It's a Dillon Tactical Vehicle (why waste time with stupid acronyms) and about the first car tailing "Cadillac One", the United States presidential limousine.
(Like in "it's there", not "point your RPG at x", Jeez! *Waiting for Secret Service to show up*)