The AEB sensors are in the top center of the windshield, and the front surface of the side mirrors. Make sure these areas are clean. Also, AEB can be manually turned on/off in the vehicle settings. Make sure it is set on.
Powering down the vehicle should reboot the computer: Shut the engine off, step out of the vehicle, shut the door, lock it, wait for the infotainment screen to turn black and cycle off (about 2 minutes).