For the railroad vehicle, see Combine car. A combination car was a vehicle built upon a (usually Cadillac) "professional car" chassis which could be employed either as a hearse or as an ambulance, and had the capability of being swapped between those roles without much difficulty. These vehicles were upgraded by coachbuilders such as Superior, Miller-Meteor, and Cotner-Bevington, and were typical of the era when funeral homes offered emergency ambulance service in addition to their primary trade. The Cadillac combination unit was made famous in Ghostbusters as the ECTO-1, a modified 1959 model.