Last week, my wife had an accident while engaging auto park to back into a parking spot in a parking structure. We had been using auto park since its inception in 2015. It had been working well for us. We loved the convenience it gave us. But our luck ended last Thursday. It started well. It was in a company park structure. My wife found a spot, and passed it. Tesla detected to spot and showed the "P" sign. My wife engaged reverse gear, and press start to engage auto park. Tesla started backing toward the spot, but suddenly accelerated quickly, and before my wife could react on it, it smashed right into a parked car on the left rear. Tesla had a big dent at the bumper, with rear back light broken. The other car had even a bigger dent. From the damages, the force was pretty big. To me, it looked like there was a glitch in the sensor or software that had caused this. This needs to be taken seriously.