In order to avoid propulsion units in the train (and thus reducing variants and development costs), it were designed to use a locomotive to haul it, and equip the end wagons with driver cabins. The train were designed a set of 5 wagons, with a service wagon in the middle (containing a small kiosk, and other facilities) and 4 passenger wagons. In 1983, the group responsible for the timetables, had made a set of requirements for the ideal future train for the InterCity traffic, and those requirements were based on the experiences from the prototype (which had now become known as IC5): it should be light-weight (preferably built of aluminium), its passenger compartments should have fixed windows and air-conditioning, it should be self-propelled, it should use standard engine and transmission components from the bus and truck industry, and it should be fast and easy to add carriages (by coupling with another trainset); along with a number of technical requirements. The new project became designated IC3. After the IC3 project had been proposed, it was relatively quickly decided to cancel development of the IC5-prototype, as it suffered from several problems. The main problem was the weight of the train. Originally it had been estimated to weigh around , but ended up weighing . A train of similar size and capacity, consisting of conventional wagons, would weigh approximately the same as originally estimated. When it was first proposed to cancel the IC5 project, the trains designers tried to save it by proposing several solutions to the trains problems, but to no use: DSB's management had decided that the IC3 was the proper train for the future. The task of developing the IC3 was assigned to a joint-group of designers and technical engineers from DSB itself and the factory Scandia (now a part of the Bombardier corporation). As a side note, it should be mentioned that neither DSB or Scandia themselves, wished that they (Scandia) got the task, as they had pretty much no experience in this kind of trains. The first IC3 set was delivered in 1988, but unfortunately suffered from a number of teething problems, primarily due to its (at the time very advanced) computer systems. One example was that it would lock the toilet door with no apparent reason (it was programmed to lock the door when either someone was in there and requested so via a button, or when the toilet-system suffered a problem). Another issue was that snow would build up around the diaphragms blocking the drivers view.