On the E32 I am hundred percent sure, no need to remove the dash, just then glovebox, the center console, the metal arm behind that from chassis to center console, the radio and the OBC, and it helps to remove the front seats and the steering wheel, so you have more space to manouver. But not a absolutel must do.
On E34 I am not sure, but should probably the same.
Stepper motors do not have a separate fuse, all controlled by the IHKA unit.
Make pics, Joe, and a nice short instruction how to do.
And good Luck