On 9 June 1947, the class was also taken into use from Oslo West Station (Oslo V) on the Vestfold Line, and along the Sørlandet Line to Kongsberg. From the 1 June 1949, after the Sørlandet Line was electrified to Kristiansand, these services were shifted to the "Sørlandet Express". On 15 November 1950, one unit was involved in the Hjuksebø train disaster, and the end car needed to be fully rebuilt. From 1 December 1956, when the whole Sørlandet Line to Stavanger was electrified, the service was extended and rebranded the "Stavanger Express". To free up sufficient stock, the "Østfold Express" was discontinued on 14 November 1956. The "Sørlandet Express" operated each day, while the "Stavanger Express" only operated three times a week. However, the "Stavanger Express" did not prove a success, featuring low passenger numbers, and the last train ran on 24 August 1958. The trains remained in service on the "Sørlandet Express" until 27 May 1967.