how does the window move when it is working?

i'm gonna chime in and say that i too believe that the motors are pretty much indestructible.

i would try to isolate the problem to either definitely the motor or the electrics before i went through the trouble of trying to switch a motor.

answer the original question.. Yeah. i do believe that the motors are interchangeable.

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Current fleet
2006 E320 CDI
1992 300D - 5speed manual swapped

former members
1984 300D "Blues Mobile"

1978 300CD "El Toro"