is that just the side airbags built into the seats and there just tryen to make the name sound fancy or something?

 

i think it is when you get into an accident and the middle of your back hits really hard against the middle of the seat, that causes the headrest to move forwards so you don't get whiplash so bad...i'm pretty sure they have an explanation w/ pics on the infiniti website

 

http://www.nissandriven.com/frameset_maxima.html

Look under Safety then Advances.
The headrest moves with your head when you get in an accident like MrBurner said. Hope this helps

 

thanx all , that's wat i thought but the thing i don't get is that it can come off and there is no wire connected to it....so how does it know to move with u when you get into an accident....how is it suppose to know, i don't think there is a pc attach to it to monitor it like the transmission and engine and things.

 

Probably when the air bag gets open