This set is for upgrading many Märklin H0 locomotives with smaller design flat-style commutator motors to the five-pole, high-efficiency motor.

The set consists of a high-efficiency motor and installation hardware.

Märklin mLD / mSD Retrofit Decoders

The Latest Technology for (Almost) Every Locomotive.

Decoders for retrofit installation in existing locomotives have been available since the beginning of the digital era in the Eighties. New technologies were however always first used in locomotives from current production at that time and were therefore not available for retrofitting. That was then, because with the new mLD and mSD decoders you can convert many older locomotives and powered units to the same technical level shown by our current high-efficiency models in conjunction with the latest control devices.