For the bottom button, seems like autobrake, some of the top luxury cars have the function, you can set a minimum distance from your car to the car ahead(some cars have a default safe distance based on the travelling speed), car will brake if distance dropped below the safe distance, so won't hit the car at front if stop suddenly.
Just my guess....作者: NewLynnHse 时间: 2011-10-31 12:36:18