was first taken into use with the opening of the Coast Line in 1897. Østerport was the initial terminus of the line, was originally called Kystbanestationen, Østerbro, København Ø and Østbanegaarden. Architect Heinrich Wenk, who drew many of the stations on the railway, was also responsible for the Eastern Station, that after decree from the Ministry of War was constructed as a temporary building. First 20 years later the line between Copenhagen Central Station and Østerport was taken into use, and the Coast Line got its present form on 1 December 1917. Change to DSBFirst In 2007 the Danish government in cooperation with Skånetrafiken announced it would invite transportation companies to take over the Coast Line. Several European operators most notably SJ, Arriva, Connex, and DSBFirst. DSBFirst won this bid due to their plan of introducing 7-Eleven to the majority of stations, keeping the current system of permanently staffed trains, and promising better scheduling. Moreover, there was a sense that it was more convenient because DSB already had trains suited to operate under the two different volt systems used for railway electrification in Denmark and Sweden. Despite serving food and coffee for passengers on their first Monday of operation, they did not win over passengers as the trains were delayed and packed. For the next few months the trains had an average delay percentage of 10, causing outcry among frequent passengers and a massive drop in rating. As of June 2009, DSBFirst managed to regain much passenger support through fewer delayed trains due to a change in timetables and better education of the train managers. Rolling stock The unique feature of the Coast Line is that despite that there is only between three and six minutes between each station, it has not been operated by S-trains. Lately the line has been operated by modern and comfortable trains, including DSB's first electric locomotives, litra EA (on the Coast Line since 1986) and the new electric regional train litra ER, started service the Coast Line in the mid 1990s. Today the main service on the line is Oresund trains that operate between Helsingør via Copenhagen and Copenhagen Airport to Malmö in Sweden and ER trains between Nivå and Kastrup. In rush hour, these trains are supplemented with higher speed commuter train operated with various stock. The replacement of steam locomotive with diesel multiple units started in 1935, but was first completed in