Cruise Control brake function

teaston · 05-08-2014, 07:31 AM

Does the cruise control with brake function activate the brake lights? For example, if you're in a 60 limit using cruise control then approaching a 30 limit you click the cc stick down 6 times, the car slows down quite sharply, so do the brake lights come on as if you are pressing the brake pedal?

Pretty sure it must do but would like to know for definite as there is obviously no way i can check for myself!

BMWSKI · 05-08-2014, 07:39 AM

Quote:

Originally Posted by teaston

Does the cruise control with brake function activate the brake lights? For example, if you're in a 60 limit using cruise control then approaching a 30 limit you click the cc stick down 6 times, the car slows down quite sharply, so do the brake lights come on as if you are pressing the brake pedal?

Pretty sure it must do but would like to know for definite as there is obviously no way i can check for myself!

Drive down to me and I'll tell you

dopper99 · 05-08-2014, 07:41 AM

I'd bloody hope so else something could go into the back of you, not realising you are (the car) is braking!!

RobUK · 05-08-2014, 07:42 AM

Yes, the cruise control brake function does activate the brake lights.

JustChris · 05-08-2014, 08:18 AM

Yes.

SomeRandomer123 · 05-08-2014, 08:58 AM

As above, yes.

SomeRandomer123 · 05-08-2014, 09:01 AM

Quote:

Originally Posted by dopper99

I'd bloody hope so else something could go into the back of you, not realising you are (the car) is braking!!

Fun fact - when the BMW i3 decelerates due to regen (no "throttle"/braking), the brake lights show. Which is a bloody good job as it decelerates hard!

Meds · 05-08-2014, 09:13 AM

Would be cool if they flashed like F1 cars when in the wet :-)

gtsussex · 05-08-2014, 09:48 AM

I'd love it if I could see when brake lights come on as you never quite know when it's happening with ACC. Just backing off can feel like braking when you're not doing it. Clearly I know when it's braking hard or when in tailbacks but would be nice to see at higher speeds.

edz_f06 · 05-09-2014, 04:42 PM

Quote:

Originally Posted by Meds

Would be cool if they flashed like F1 cars when in the wet :-)

They do if the ABS kicks in...

edz_f06 · 05-09-2014, 04:43 PM

Quote:

Originally Posted by gtsussex

I'd love it if I could see when brake lights come on as you never quite know when it's happening with ACC. Just backing off can feel like braking when you're not doing it. Clearly I know when it's braking hard or when in tailbacks but would be nice to see at higher speeds.

Fortunately on my F31 I can see the high level light reflected in the dealer sticker at the top of the rear window

Tengocity · 05-09-2014, 05:00 PM

I'm going to offer the opinion that Cruise control with brake function doesn't activate the brake lights... It only uses the brakes to ensure that when going downhill you do not go over your set speed, hence there should be no deviation from your set speed, and hence no need for brake lights to come on.

I'm basing that on the logic in my head rather than knowing definitively! If someone knows for sure that they do then happy to accept it...

With Active cruise where the car will slow down automatically to keep a set distance then the brake lights do come on.

teaston · 05-09-2014, 05:03 PM

Quote:

Originally Posted by Tengocity

I'm going to offer the opinion that Cruise control with brake function doesn't activate the brake lights... It only uses the brakes to ensure that when going downhill you do not go over your set speed, hence there should be no deviation from your set speed, and hence no need for brake lights to come on.

I'm basing that on the logic in my head rather than knowing definitively! If someone knows for sure that they do then happy to accept it...

With Active cruise where the car will slow down automatically to keep a set distance then the brake lights do come on.

I agree it should put the brake light on when going down hill as all it's using the brakes for is to maintain the same speed.

But as i said when you click the stick down several times surely it uses the brakes, don't think engine braking would slow it down that sharply?

Mattt1 · 05-09-2014, 05:03 PM

Normal cruise will brake the car if you reduce the speed dramatically though, so the lights should come on.

SomeRandomer123 · 05-09-2014, 05:04 PM

Nope, brake lights do come on when cruise control uses its brake function. Sorry

Tengocity · 05-09-2014, 05:05 PM

Quote:

Originally Posted by teaston

I agree it should put the brake light on when going down hill as all it's using the brakes for is to maintain the same speed.

But as i said when you click the stick down several times surely it uses the brakes, don't think engine braking would slow it down that sharply?

Ok so I only read the first part of your first post! In that situation then I can't imagine that it wouldn't use your brake lights.

Tengocity · 05-09-2014, 05:06 PM

Quote:

Originally Posted by SomeRandomer123

Nope, brake lights do come on when cruise control uses its brake function. Sorry

Ok fair enough!

Flakmunky · 05-10-2014, 12:20 AM

Quote:

Originally Posted by edz_f31

Fortunately on my F31 I can see the high level light reflected in the dealer sticker at the top of the rear window

you have left the sticker on?! First thing that comes off my cars!

My dealer didn't put one on after I told them not to.

edz_f06 · 05-10-2014, 05:47 PM

Quote:

Originally Posted by Flakmunky

you have left the sticker on?! First thing that comes off my cars!

My dealer didn't put one on after I told them not to.

I asked them not to put it on but then didn't bother to remove it when it was already on!

Good for seeing the brake lights when on cruise tho

05-08-2014, 07:31 AM	#1
teaston Banned 10995 Rep 32,881 Posts Drives: X3 M40d Join Date: May 2012 Location: The High Seas iTrader: (1)	Cruise Control brake function Does the cruise control with brake function activate the brake lights? For example, if you're in a 60 limit using cruise control then approaching a 30 limit you click the cc stick down 6 times, the car slows down quite sharply, so do the brake lights come on as if you are pressing the brake pedal? Pretty sure it must do but would like to know for definite as there is obviously no way i can check for myself!
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05-08-2014, 07:41 AM	#3
dopper99 Lieutenant General 3531 Rep 11,292 Posts Drives: Golf R Mk8 Join Date: Jun 2011 Location: UK iTrader: (1)	I'd bloody hope so else something could go into the back of you, not realising you are (the car) is braking!! __________________ Current: Golf R Mk8 Previous: Golf R Mk7.5 Mercedes AMG C63 S Coupe F80 M3 Competition Pack
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05-08-2014, 07:42 AM	#4
RobUK Brigadier General 2812 Rep 4,935 Posts Drives: 340i MPPSK Join Date: Jun 2012 Location: Sussex, N.Yorks, UK iTrader: (0) Garage List 2015 340i MPPSK [0.00] 2001 Yamaha FZS1000 [0.00]	Yes, the cruise control brake function does activate the brake lights. __________________ Life is a state of mind
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05-08-2014, 08:18 AM	#5
JustChris General 17488 Rep 25,115 Posts Drives: Tesla MYRWD Join Date: Jul 2013 Location: UK iTrader: (0)	Yes. __________________ My car made front page of Bimmerpost
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05-08-2014, 08:58 AM	#6
SomeRandomer123 Colonel 307 Rep 2,612 Posts Drives: F30 328i Luxury - Sport Auto Join Date: May 2011 Location: Lancashire, North West England, UK iTrader: (0)	As above, yes. __________________ Gone: 2006 BMW E60 520d SE 6MT Gone: 2009 BMW E90-LCI 330d SE 6MT Current: 2012 F30 328i Luxury 8AT On Order: 2015 Audi A6 Avant Ultra, Black Edition (sorry!)
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05-08-2014, 09:13 AM	#8
Meds Lieutenant 73 Rep 564 Posts Drives: F30 328i M Sport + Join Date: Feb 2014 Location: Watford (displaced Yank!) iTrader: (0)	Would be cool if they flashed like F1 cars when in the wet :-) __________________ F30 328i M Sport + Twitter: @3qtrsamericano
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05-08-2014, 09:48 AM	#9
gtsussex Brigadier General 1854 Rep 3,983 Posts Drives: SMB M3 CP with lots of carbon Join Date: Jun 2013 Location: East Sussex iTrader: (0)	I'd love it if I could see when brake lights come on as you never quite know when it's happening with ACC. Just backing off can feel like braking when you're not doing it. Clearly I know when it's braking hard or when in tailbacks but would be nice to see at higher speeds. __________________ San Marino Blue M3 Competition Package with Carbon tat, ACS RS suspension, uprated brakes, 'modded' exhaust and a weeny bit more power courtesy of JF Automotive; M235i Convertible with ACS Sports Suspension; Disco 5 HSE Lux
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05-09-2014, 05:00 PM	#12
Tengocity General 8567 Rep 19,982 Posts Drives: 911, Cayenne Turbo, Disco 4 Join Date: Sep 2013 Location: Crieff, Perthshire, Scotland iTrader: (0)	I'm going to offer the opinion that Cruise control with brake function doesn't activate the brake lights... It only uses the brakes to ensure that when going downhill you do not go over your set speed, hence there should be no deviation from your set speed, and hence no need for brake lights to come on. I'm basing that on the logic in my head rather than knowing definitively! If someone knows for sure that they do then happy to accept it... With Active cruise where the car will slow down automatically to keep a set distance then the brake lights do come on. __________________ Current: Porsche 911 991 C4S, Porsche Cayenne Turbo, Land Rover Discovery 4. Gone...G01 X3 M40i, Cayman S 987, F31 340i, Cayman GT4, F82 M4 CP, Lotus Exige V6, G20 330e, F30 330e, Boxster S 987, F31 335d, Mini Cooper SD, E89 Z4, E90 330d 320d, E60 520d, E46 330d 320d, MX5s, E30 325i
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05-09-2014, 05:03 PM	#14
Mattt1 Lieutenant 81 Rep 568 Posts Drives: 335d xDrive Join Date: Jan 2014 Location: Lincs iTrader: (0)	Normal cruise will brake the car if you reduce the speed dramatically though, so the lights should come on.
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05-09-2014, 05:04 PM	#15
SomeRandomer123 Colonel 307 Rep 2,612 Posts Drives: F30 328i Luxury - Sport Auto Join Date: May 2011 Location: Lancashire, North West England, UK iTrader: (0)	Nope, brake lights do come on when cruise control uses its brake function. Sorry __________________ Gone: 2006 BMW E60 520d SE 6MT Gone: 2009 BMW E90-LCI 330d SE 6MT Current: 2012 F30 328i Luxury 8AT On Order: 2015 Audi A6 Avant Ultra, Black Edition (sorry!)
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