THE EMERGENCY ASSISTANCE BRAKE SYSTEM WAS ACTIVATED AND IT REDUCED SPEED WHEN VEHICLE WAS STOPPED AHEAD OF ME BUT WOULD NOT RESPOND TO MY BRAKING. MY VEHICLE SLID INTO OTHER VEHICLE AT 6.8 MPH (SEE ATTACHED REPORT). I TRIED TO APPLY MORE PRESSURE TO BRAKES BUT THE VEHICLE DID NOT RESPOND TO MY BRAKE PRESSUREI WAS PROCEEDING STRAIGHT ON CITY ROAD