So mine has been misbehaving lately. I've found that under this situation it doesn't work:
ACC set. Lane clear ahead (the dash indicator shows that it has no vehicle ahead acquired). Coming up on a stop light with a vehicle stopped in my lane (left or right, doesn't matter) the D will fairly consistently not acquire the stopped car in my lane and if I don't grab on binders I would no doubt plow into the stopped car.
I'm guessing this quirk has something to do with logic to prevent the car from responding to cars in adjacent, opposing, lanes from tripping false brake alerts but regardless, it's pretty unnerving. It works fine when approaching slower moving cars and if acquired vehicles slow down and stop. Just this scenario of approaching stopped vehicles.
Anyone else notice this?