introduction of the signature red colour that was to characterize subsequent generations of rolling stock. There have been three different formations: the first (2-car), had a motor car with first-class seating (could be converted to second class) and a second-class trailer; the second (2-car), had second-class seating only; and the third (4-car), a motor car with driver's cab, a trailer, a motored trailer and a driving trailer without motor. They ran until 7 January 2007. All have been scrapped except for a few set aside for museum use. An official ceremony was held on 3 February 2007 with the last trip. One train is set to be restored by DJK (Danish Railroad Club), who are now the owners of the train, so it can eventually make its way back to the tracks on special occasions such as anniversaries. Third generation (1986-2006) The third generation (DSB class FC-MC-MC-FC) were built by the Swedish industrial firm ASEA from 1979 to 1986. Despite possessing a much improved level of passenger comfort as compared to the previous two generations of rolling stock, it suffered a much higher rate of mechanical failure as compared to its predecessors. Twelve trains in 4-car formation (48 cars) were built (a further 32 4-car trains were not realised), and it first entered service in 1986 on the Vestbane and the Nordbane (B service) between Holte and Høje Taastrup. They were the first S-train rolling stock to feature electronic chopper control. In 1995, 4 trains (16 cars) were scrapped and the remaining 8 trains (32 cars) were refurbished and reassigned to the Ringbane (F service), where they remained in service until an incident where a child was trapped between the doors forced their early retirement in June 2006. When attempts to sell them failed, they were transported to Holbæk harbour on 23 August 2007 in order to be scrapped. Fourth generation (1996-present) The fourth generation, in service since 1996, are distinguished by their plump appearance due to their curved sides. Two variants are in use, one of eight cars referred to as (formed of vehicles SA-SB-SC-SD-SD-SC-SB-SA) and one of four cars referred to as (formed SE-SF-SG-SH) These are articulated units supplied by Alstom-LHB and Siemens with prefabricated friction stir welded aluminium roof panels made by Marine Aluminium from Sapa extrusions, and were manufactured from 1996 to 2007. The cars are shorter than conventional railway cars; each has a single axle