MZ I Ten units of the first series were built between 1967 and 1969, each costing
DKK ~2.4 million each. One is kept by the
Danish Railway Museum (MZ 1401), As for 2015, 1425 was sold to Svensk Tågkraft making the 2nd series the only series not to exist in Denmark anymore.
MZ III Twenty units of the third series were built between 1972 and 1974 at a cost of
DKK ~3.75 million each. They have a slightly different appearance and were equipped with more powerful engines (20-cylinder version) and higher top speed. All were overhauled in
Copenhagen before being exported. They were shipped between 2006 and 2008. The last batch of six were damaged in transit off Bermuda when the MV
Emmagracht encountered rough seas. All were off-loaded in
Savannah, Georgia to be cleaned of oil contamination. Upon arriving in Australia, 1441 and 1444 were declared write-offs and scrapped at
Bradken's
Braemar facility in 2010. After being regeared with a top speed of 105 km/h, the remainder entered service retaining their existing numbers. All were included in the purchase of the IRA business by
Qube Logistics. In December 2011 1438 incurred major damage at
Port Botany and was later scrapped. Having been in store at Port Botany for some period, 1446 moved to
Cardiff Locomotive Workshops in 2016. As for 2018, there is only one unit of the 3rd series remaining in Denmark. Its last use was in 2016, and has since stayed in
Niebüll for two years, before yet again returning to Denmark. However it was left on a siding at
CFL Cargo Denmark (now Viking Rail) in
Padborg. Doomed by many as useless due to it being in bad condition, no one saw potential in leasing 1439. In late quarter of 2024 however, it was sold to The Golden Train in Norway after nearly 9 years out of service, and looking quite shabby. The locomotive is currently undergoing heavily overhaul at Railcare Tåg AB's workshop, the project can even be followed on Railcare Tågs Instagram. While this is good news for a locomotive that seemed doomed, it was also the last Class MZ III to leave Denmark, making this series extinct in Denmark, along with the second series.
MZ IV Fifteen units of the fourth series were built between 1977 and 1978. It has the same performance as the MZ III, but a slightly different appearance (narrower front window). Two units were sold to TÅGAB of Sweden in 2006, scrapped in 2015, five to Baneservice, Norway in 2009, now owned by NRFAB in Sweden. The remainder have been in service with Railion Denmark (Now DB Cargo Scandinavia) since 2001, as for 2018, 6 of the MZ IV remain in service in Denmark. 2 units were sold 2015 to NRFAB in Sweden. ==Preservation==