WHILE ACCELERATING FROM A STOP LIGHT FROM 0 TO SLIGHTLY OVER 40 MPH RECEIVED ERROR CODE OF ANTI COLLISION ASSIST INOPERABLE AND THE VEHICLE WENT FROM 40 MPH TO 0 LIKE I HIT A TREE. IT WAS NOT A SLOW SMOOTH MOTION OF SLOWING TO A STOP. THIS WAS A VIOLENT STOP THROWING ME FORWARD AND CAUSED MY SEAT BELTS TO ACTIVATE. IT SHOULD BE NOTED THAT THERE WAS NOT A SINGLE PERSON IN FRONT OF ME, BEHIND ME OR BESIDE ME. THIS WAS NOTHING SHORT OF A MIRACLE BECAUSE IF ANYONE HAD BEEN BEHIND ME, I WOULD HAVE BEEN REAR ENDED AND IF ANYONE HAD BEEN IN THE RIGHT HAND LANE I WOULD HAVE HIT THEM AS THE VEHICLE PULLED TO THE RIGHT VERY HARD WHEN IT MALFUNCTIONED. I TOOK THE CAR TO THE DEALER AND TOLD THEM I DID NOT WANT THE CAR BACK UNLESS THEY COULD DETERMINE WHAT HAD HAPPENED AND COULD PROMISE THAT IT WOULD NEVER HAPPEN AGAIN. UPON READING SO MANY COMPLAINTS ABOUT THE SAME LIFE THREATENING ELECTRICAL MALFUNCTION, THERE IS NO POSSIBLE WAY THAT MERCEDES BENZ IS NOT FULLY AWARE OF THE POTENTIAL FOR SERIOUS INJURY OR DEATH. I HAVE CALLED MB USA AND WAS TOLD THAT I WOULD NEED TO FILE A CUSTOMER INQUIRY. DONE. I PURCHASED THE VEHICLE IN APRIL 2016 WITH 7,200 MILES ON IT. I AM COMPLETELY TERRIFIED TO DRIVE THE CAR.