Cannot find actual car, so I would guess that someone has taken a Loewy designed Studebaket of the type that has the vertical grille, chopped the top off, and substituted a Mercedes grille and air vent, plus of course the expected mods to make it look like a showstopper. Studebaker Packard at one point were about to add Mercedes Benz to their dealerships, so there is some natural synergy.
My guess would be that it is a Studebaker Hawk GT that has been sacrificed.