After that, I got takeout from the Chinese supermarket (very crowded because people were rushing to get groceries before the snow) in River Edge before heading home, arriving a mere half an hour before the snow really got started.
I saw a "Check VSC System" warning message. It only shows up if I don't release the parking brake before starting the car, so it's probably not a major problem. I'll have it looked at on a weekday evening.