[hyperzulu]

Anyone have any idea if this is something we have or can code into our cars if not? Is it against regulations?

If you're not familiar with this, it's something I noticed in a couple of cars while doing European delivery of my new BMW. The first time it happened was with a Mercedes that was in front of me during some heavy traffic in Berlin. The car came to a hard stop and its hazard lights flashed. The second time was on the Nürburgring when an M4 made a VERY hard stop in front of me (tire squeal involved), which triggered its hazard lights.

I haven't been able to find any documentation, but curious if others have experienced it in their cars or know what I'm talking about.

[hyperzulu]

http://www.bmw.com/com/en/insights/t..._force_display

[2+3=5]

My 2014 only has brake force display (no hazard lights)

[hyperzulu]

Originally Posted by 2+3=5

My 2014 only has brake force display (no hazard lights)

So I have to assume then that this is something within the coding itself.

Maybe @pikcachu knows.

[MG 228i]

Yup, no hazards for us.
I noticed when I went to the ultimate driving event autocross and at the BMW Buttonwillow track event.

It's just an extra set of brake lights that light up on hard braking.

[hyperzulu]

Thanks. I'd really like to enable this on my car as I think it really would help alert a driver behind me. I know when I saw it, it caught my attention. I wasn't distracted by it or anything. At first I just assumed the driver had flipped his hazards on manually until I saw it a second time on a hard brake.

[TB///M3]

It can be coded to have that additional light to blink instead of solid light.

[2+3=5]

Note, in some states it is not permitted or permitted only in emergency/hazard situations... goggle it.. there are some interesting articles on the subject...

[ewohar]

I think that the LED brake lights already show different intensity based on how hard you brake, if that is helpful.

[hyperzulu]

Originally Posted by BluF22

It can be coded to have that additional light to blink instead of solid light.

Originally Posted by ewohar

I think that the LED brake lights already show different intensity based on how hard you brake, if that is helpful.

Right, all the newer cars have brake force display, but in Europe they get this:

(Now that I am home and can actually see videos)

[dtcoff]

In Germany it is the normal procedure, may even be law but can't remember as I stopped living there in 1994, to put on hazard lights when stopping in a traffic jam on the autobahn. This function would make that easier for sure, but not sure how legal it is in other countries.

[chaswyck1]

I can't imagine why this would be illegal. It looks like a great safety feature to me. One earlier posting said in some states it is only permitted in "emergency or hazard situations". I would call an abrupt stop with brakes that are almost certainly bigger and better than the car behind you a hazard situation.

[hyperzulu]

Agree. Definitely coding this on my car when I get it back.

[bimmercar]

anyone know the coding for the break force display?

I don't know if its able to be changed...

ref:
https://drive.google.com/file/d/0Bwv...hKSWdRTDg/edit

[CBB1978]

It seems like an odd restriction to have. I have the flashing hazards under hard braking enabled on my car and it is an awesome feature.

[nike001]

I had it coded on my E46 now, I dont see how/why it'd be hard to code it on the F22's

[pikcachu]

Originally Posted by bimmercar

anyone know the coding for the break force display?

I don't know if its able to be changed...

ref:
https://drive.google.com/file/d/0Bwv...hKSWdRTDg/edit

FEM_BODY 3060 ESS_AKTIVIERBARER_AUSGANG flaechenvergroesserung 1 = flaechenvergroesserung: bigger brake light area. 2 = nitch_aktiv: disables. 3 = bremslicht_blinkend: light flashes

Not sure if it works if you don't have LED lights though... some people where saying that you get a "lighting malfunction" message if you set to flashing...

I haven't tried it myself... if anybody does, let us know if it works

[bimmercar]

Originally Posted by pikcachu

FEM_BODY 3060 ESS_AKTIVIERBARER_AUSGANG flaechenvergroesserung 1 = flaechenvergroesserung: bigger brake light area. 2 = nitch_aktiv: disables. 3 = bremslicht_blinkend: light flashes

Not sure if it works if you don't have LED lights though... some people where saying that you get a "lighting malfunction" message if you set to flashing...

I haven't tried it myself... if anybody does, let us know if it works

oh, I forgot to mention, I am getting a M235i soon, so the coding for break force display is for the F22

[pikcachu]

yes... flaechenvergroesserung is the default for the F22 and bremslicht_blinkend is flashing

[hyperzulu]

I coded it on my car and it works well. The default US values is set to a very low threshold compared to the European values. Not sure what the threshold values really mean, but I think the value is set to 5 and it works fine for me. I've tested it out on an open road trying to determine how much brake force I need to apply to trigger it, and it only activates during medium/hard braking - meaning I'm depressing the pedal pretty deep.

I think the European standard is for this to activate only during what would indicate an emergency situation - very hard braking. The M3/4 that stopped in front of me on the Nordschleife was using full brake force when his activated. Seeing as how Germans are more attentive when driving, I think a higher threshold works for them. Here where everyone is literally texting on the highway doing 70mph with only two car lengths between them and the car ahead of them, a much lower threshold may work best

[bimmercar]

Originally Posted by pikcachu

yes... flaechenvergroesserung is the default for the F22 and bremslicht_blinkend is flashing

awesome, can't wait to get the car and do all the coding!

[pikcachu]

Originally Posted by hyperzulu

I coded it on my car and it works well. The default US values is set to a very low threshold compared to the European values. Not sure what the threshold values really mean, but I think the value is set to 5 and it works fine for me. I've tested it out on an open road trying to determine how much brake force I need to apply to trigger it, and it only activates during medium/hard braking - meaning I'm depressing the pedal pretty deep.

I think the European standard is for this to activate only during what would indicate an emergency situation - very hard braking. The M3/4 that stopped in front of me on the Nordschleife was using full brake force when his activated. Seeing as how Germans are more attentive when driving, I think a higher threshold works for them. Here where everyone is literally texting on the highway doing 70mph with only two car lengths between them and the car ahead of them, a much lower threshold may work best

I think it's km/h in some period of time...

there are only 3 options 32 15 or 5.....
so if you are going 80km/h you would need to drop to 65km/h if you have setting of 15...

that's my guess but comments on the coding feature were not very explanatory