The contact owns a 2009 Mercury Milan. The contact stated while driving at an undisclosed speed, the brake pedal was depressed and traveled to the floorboard. There was no warning light illuminated. The contact engaged the parking brake to stop the vehicle. The vehicle was restarted. The vehicle was taken to the dealer where it was diagnosed and determined that the ABS hydraulic control unit had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and confirmed that the VIN was not included in NHTSA Campaign Number: 19V904000 (Service Brakes, Hydraulic). The approximate failure mileage was 100,000.