Electronic Emergency Brake PREFILL
WARNING: This page is about a different car, the 2018 Jaguar XE and 2017 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
Electronic emergency brake prefill senses any rapid throttle lift off actions, activating a small brake hydraulic pressure buildup of approximately 3 to 5 bar (43.5 to 72.5 lbf/in2 ) in anticipation of the brakes being applied.
This application produces a quicker brake pedal response and consequently slightly shorter stopping distances.