Motor cars were sometimes paired back-to-back for what was known as "E" trains. They were formed with two M cars acting as locomotives, hauling a train of typical outer-suburban or country stock. They ran to Frankston, where the train would split and steam engines would take the non-electrified carriages on to Mornington and Stony Point, and to Lilydale, where the train would split, and steam engines would take the non-electrified portion on to Healesville and Warburton. Those runs were abolished in 1958, following the arrival of the Walker railmotors, and operational practice changed to using connecting trains at the end of the electrified system, instead of running through carriages. A number of swing-door motor cars had been specially altered for E train use, but in practice they weren't always available, so Tait motors may have been required as a substitute.
