Between 1967 and 1969 the Danish State Railways DSB purchased 10 units of the diesel-electric series MZ I, and in the following year 16 units of the type MZ II, which differ from the former only in a changed position of the battery box and the air reservoir. Traditional American engine technology works in the locomotive bodies manufactured by Frichs. The diesel engine chosen was the 2426 kW (at 900 rpm) 16-cylinder two-stroke engine 16-645 E3 from EMD, which generates the energy for the six traction motors manufactured in Denmark. With a top speed of 143 km/h, the six-axle vehicles were mainly used in front of passenger trains, for which they had steam heating. From 1980 the boiler was replaced by an electric heater, which was supplied with voltage by a separate diesel engine, and a push-pull train control system was installed at the same time. Different starting processes can be selected with F1: 1x press button = warm start / press button 2x = false start / press button 3x = cold start
F5 enables the heavy load mode: The diesel notch is always one up compared with normal operation. If you want to jump two notches, simply set CV 104 to 170 (instead of 150).
F27 turns on the manual ntoching. Once F28 is on, you can use F28 to notch up and F29 to notch down. F27, F28, and F29 must be turned off to return to normal mode. If F27 is off and you press F28, the prime mover will run to full speed.
F17 will bring the locomotive to full stop.