I wasn't quite sure what to expect of AEB and it's spectrum of usage. So asked Tesla and they clarified well. Hope you find it useful too. Thank you for contacting Tesla Vehicle Support. Here is some information about the AEB. When Automatic Emergency Braking has reduced the driving speed by 25 mph (40 km/h), the brakes are released. For example, if Automatic Emergency Braking applies braking when driving at 56 mph (90 km/h), it releases the brakes when the speed has been reduced to 31 mph (50 km/h). Automatic Emergency Braking operates only when driving between 5 mph (8 km/h) and 85 mph (140 km/h). Automatic Emergency Braking does not apply the brakes, or stops applying the brakes, when: • You turn the steering wheel sharply. • You press the accelerator pedal. • A vehicle, motorcycle, bicycle, or pedestrian, is no longer detected ahead. Automatic Emergency Braking is always enabled when you start Model S. To disable it for your current drive, touch Controls > Settings > Driver Assistance > Automatic Emergency Braking > Disable.