300E 4MATIC (124.230) L6-3.0L (103.985) (1990)
6. Unscrew nut on window lifting rail front and disengage window lifting arm.
7. Lift window at the rear and extend slide shoes at cutout of window lifting rail.
8. Push window in upward direction and protect with plastic wedge against falling down.
9. Unscrew fastening nuts (5 each).
10. Remove window lift with motor and guide rail in downward direction.