That BCW is on when you put the car in reverse and the (RCCW) in on as soon as it put in reverse. Driver Attention Warning (DAW) actuates depending upon the sensitivity it set at. I'm not exactly sure at what point it does but it has work before and I've heard the activation.
It depends where you are in the world actually. The US warranty manual as suggest above, states 20 mph and the NZ and Aussie models which are equipped, are at 18.6 mph or 30 km/h. So there are some small differences.
I have found out thru monitoring the systems, especially the LKA set on the highest sensitivity, will actually disengage in heavy traffic but will remain in a monitoring mode and alert you with a white flashing line and audibly. The green steering wheel will disappear and the white lines will remain active and the alert will sound. Once you are under the speed of 6 mph both white indicator lines will change from bright white to a lesser white indicating the system is on stand-by but monitoring.
One thing to note is; if you are driving on a road with no painted side line, or the line breaks for a turn off lane or cross streets, it will detect these open areas and attempt to find them thru the driver assisted steering. A little disconcerting at first but be aware. Once it finds the line, it will attempt to correct thru the steering if you are partially out of the lane. Just pay attention. I've actually had it attempt to abruptly steer to the center line and then correct. It's not a fool proof system. In the ultimate Trim, there is also a High Beam Assist which will actually dim the LED high beams and during turns temporarily shut off the fog lamps automatically to on coming traffic. There is also rear parking distance warning which can be shut off manually by the operator.
All these warning and cautions in the Ultimate trim are seen thru the heads up display, thru the dash information screen, and audibly or all three. Those without, I'm not aware how it's monitored, possibly thru the dash information screen and audibly I might imagine.
These system are designed to overlap and function in unison of one another.