I don’t want to admit to this as I will most likely be shamed but I put an early Bosch motor in my 94 E420. I clipped the wires from my old motor, crimped on connectors and made the required adaptor. It took a while but my cages came off and went on the new motor just fine. I had to mess with centering my cages in the plastic housing but that was not bad. The shafts on the early motor are longer than the late motor but did not seem to be an issue. The swap was done back in October and it is quite and works just fine.