The German Army demanded that the E-series tanks had transmissions positioned in the rear. However, the E 50 and E 75 tanks used the Tiger II engine-transmission compartment, which allowed engineers to work faster, but made rear placement of the transmission impossible. The E 50 Ausf. M tank was a redesign of the E 50 project with the transmission placed in the rear.
Marks of Excellence requirements for E 50 Ausf. M: beta