ON WEDNESDAY, APRIL 4TH, I WAS HELPING MY COLLIE INTO THE BACK OF THE SUV TO TAKE HER TO THE VETS AND THE LIFT GATE AUTOMATICALLY BEGAN COMING DOWN WHEN SHE WAS HALF IN. I PUSHED THE BUTTON TO STOP IT AND MY DOG STARTED FALLING OUT, WHEN I TUNED RO CATCH HER THE LIFT GATE HIT MY HEAD WITH ENOUGH FORCE THAT I FELL ON MY KNEES AND SUFFERED A CONCUSSION THAT I AM STILL STRUGGLING WITH. THAT LIFT GATE HAS AUTOMATICALLY COME DOWN AT LEAST A COUPLE DOZEN TIMES AS WE PUT THINGS IN THAT BACK SUCH AS GROCERIES OR BOXES. WE USUALLY MANAGE TO GET OUT IF THE WAY. WE COMPLAINED TO THE SERVICE DEPARTMENT IN DECEMBER BUT IT WORKED FINE WHEN THE TECH CHECKED IT AND HE DIDN'T KNOW WHAT COULD BE THE PROBLEM. I HAVE FILED A COMPLAINT WITH BMW OF OCALA, FLORIDA AND HAVE BEEN CONTACTED BY THEIR MAIN OFFICE IN NJ. I AM REPORTING IT BECAUSE THIS COULD POSSIBLY KILL A PERSON OR PET.. THE CAR WAS PARKED IN OUR DRIVEWAY AND TURNED OFF, THE PASSENGER DOOR MAY HAVE BEEN OPEN SINCE I WAS PUTTING THINGS IN THE CAR FOR MY DOG, BUT I'M NOT SURE.