This is what
Doanster is describing that is standard on Euro spec cars, but can be coded into your US spec car:
I could not find a video of it on the F15, but essentially works the same way with 3 stages; normal, hard, very hard indications.
The center brake light flashing that
bbl_jeff installed flashes the center every time regardless of how hard you press the brake.
I see this on lots of cars now. I think that if you are in an area where you drive in lots of bumper to bumper traffic that it's a good idea; anything that gets or might get the attention of someone behind you is a good thing. Studies have proven that flashing lights get more attention than steady ones.
I'd be curious if this works with the brake force coding. Be happy to try it out on mine and report back if
bbl_jeff wants to send me one.