I think it is part of the adaptive cruise package. Here's a brochure on it: http://media.ford.co...tive_Cruise.pdf
There's a collision warning system that will alarm when you get too close to the car in front of you that has slowed down suddenly. It will also go off if the car in front of you slows to make a right turn and you stay close to get around it. I've had it go off a couple of times.
So, from reading that info, it sounds like drafting could still be dangerous because if the semi slammed on the brakes, even with the warning and this system there's still the potential to hit the truck
Thanks for te info elle. I would have loved to get that option over the moonroof that I have.
It would have been a nice feature to have, but I believe it required getting MFT which we didn't want. When we test drove a C-Max with MFT and a Fusion with the conventional buttons we decided that we just wanted the conventional buttons. Mainly because we did not want a back up camera. We both found it to be distracting and hard to use. So to get ACC we would have been required to spend $900 for MFT which we didn't want and then another $2k or something like that for the Tech Pkg with BLIS and ACC...oh well, maybe on our next car in 10 years...