At what maximum speed can the autopilot be engaged in the ERJ 170/175?

The maximum speed at which the autopilot can be engaged in the ERJ 170/175 is 250 KIAS. This limitation is crucial because engaging the autopilot beyond this speed could lead to adverse aerodynamic conditions or control challenges that may compromise flight safety. The autopilot system is designed to operate within specific parameters, and exceeding these thresholds may result in suboptimal performance or failure of the autopilot to function correctly. By adhering to this limitation, pilots ensure that the autopilot system is used safely and effectively, maintaining stable flight operations.