I had my Auto Hold button stick and was hard to push down. When It finally worked, everything seemed to be ok except it wasn't smooth to push the button. Next time I got in the car I tried pushing the button again and it stuck so I pushed the parking brake along with it to see if that worked. The brake engaged. But when I pushed the button to disengage, the brake didn't disengage. I ended up having to turn the car off and turn it back on again. Then push the brake button again for it to disengage. I had this happen a couple more times and the dealership was able to play with it and replicate the problem.