MRCE Dispolok is a rolling stock leasing company, part of the Mitsui conglomerate from Japan. It exists since January 2008, when Mitsui concentrated all leasing activities in Europe, formerly managed by two different subsidiairies, MRCE and Dispolok (acquired from Siemens). Originally, these five units were ordered for MRCE. In 2005 it invested in several types of Bombardier locomotives, including 5 MS electrics. As these machines are capable of running under all 4 catenary systems in Europe, but are only equipped with the safety and signalling systems for Switzerland (Integra and ZUB262) and Italy (RS4 Codici and the new SCMT system). Testing of these systems was not done in Kassel, but in the work shops of Bellinzona in Switzerland. Because of poor communication between leasing company and the Italian authorities the machines were renumbered twice before they actually went into service, from E484.9xx to E484.1xx and back.