I WAS PARKING WHEN I TOTALLY LOST CONTROL OF MY CAR. I COULD NOT STEER IT AND I COULD NOT BREAK. I WENT LEFT WHILE I WAS ATTEMPTING TO BRAKE BUT I HAD NO BRAKES. I ATTEMPTED TO GO STRAIGHT AND HIT ONE PARKED CAR. THEN I WENT RIGHT AND DAMAGED ANOTHER CAR THEN THE CAR HIT A 3 CAR. THEN THE CAR STOPPED. I RECEIVE A BMW ASSIST MESSAGE REGARDING HAVING AN ACCIDENT THEN THE SCREEN WENT DEAD. I WAS PARKING MY CAR. FEW WEEKS BEFORE I RECEIVED THE FOLLOWING MESSAGE: CHASSIS STABILIZATION PROBLEMS. YOU CAN CONTINUE DRIVING BUT TAKE YOUR CAR TO THE DEALER ( SOMETHING LIKE THAT). I STOPPED THE CAR AND THE MESSAGE WENT AWAY. NEVER CAME BACK. SO I WAS PLANNING TO TALK ABOUT IT TO THE DEALER WHEN GOING FOR THE NEXT APPOINTMENT. I WAS PARKING IN A PLACE I KNOW VERY WELL, HISPITAL PARKING.