Cruise control deceleration

RobUK · 04-13-2013, 02:59 AM

One for you experts out there.... when the car decelerates rapidly on account of the cruise control, do the brake lights show?

I have noticed that if I have the cruise set to say 70mph and I then use the rocker thing on the steering wheel to drop the speed to 60mph quickly, the car actually feels like it's braking. I guess it's similar for those with active cruise, if a car pulls in front of you then you'll probably slow quite quickly. Is the car actually using the brakes (as opposed to engine braking) to slow the car down, in which case do the brake lights come on, given that you haven't actually plonked your foot on the pedal?

This is the first car I've had with cruise control that does this. Previous cars seemed to just gently lose speed (by coasting?) until the lower set speed is achieved. I know the F30 (as well as other models) has 'Brake Drying' so seems it can apply the brakes when it feels the need.

venkata · 04-13-2013, 03:25 AM

I hope so, only noticed the brake effect the other day. I thought it would cruise to the lower speed but found it braked quite hard. Don't think i'll do that next time as i could annoy the person behind me for unnecessary braking when there is no obstruction in front.

Doc943 · 04-13-2013, 03:33 AM

Yes they do. I set my CC to 30 mph down a very long, winding and steep hill near Whitby and could see the brake light reflection in the road signs and car behind. Quite a surreal experience not braking and putting my trust in some electronics!

edz_f06 · 04-13-2013, 12:04 PM

Yes it definitely does put the brake lights on when the CC is slowing the car down a lot. Also you can feel it is using the brakes if you then want to slow down even more as the pedal travels very little (!) before major stopping power of the brakes!!

SomeRandomer123 · 04-14-2013, 10:58 AM

Yep, we have Cruise Control With Brake Function.

Edtheted · 07-12-2013, 09:59 AM

Also do the brake lights flash when you do an emergency stop like the Mercs do?

SomeRandomer123 · 07-12-2013, 10:15 AM

Quote:

Originally Posted by Edtheted

Also do the brake lights flash when you do an emergency stop like the Mercs do?

The standard cruise control on the 328i is called Cruise Control with Brake Function. The car will apply the brakes as necessary to decelerate the vehicle and the brake lights will be shown.

The brake lights also flash rapdily when performing an emergency stop, with the hazard lights activated just as the car comes to a halt.

Edtheted · 07-12-2013, 10:32 AM

Thank, how come BMW aren't using LED stop/winker lamps anymore like the e90s used to?

SomeRandomer123 · 07-12-2013, 03:59 PM

Quote:

Originally Posted by Edtheted

Thank, how come BMW aren't using LED stop/winker lamps anymore like the e90s used to?

To keep an update reserved for the F30 LCI, annoyingly.

04-13-2013, 02:59 AM	#1
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]	Cruise control deceleration - does it show the brake lights? One for you experts out there.... when the car decelerates rapidly on account of the cruise control, do the brake lights show? I have noticed that if I have the cruise set to say 70mph and I then use the rocker thing on the steering wheel to drop the speed to 60mph quickly, the car actually feels like it's braking. I guess it's similar for those with active cruise, if a car pulls in front of you then you'll probably slow quite quickly. Is the car actually using the brakes (as opposed to engine braking) to slow the car down, in which case do the brake lights come on, given that you haven't actually plonked your foot on the pedal? This is the first car I've had with cruise control that does this. Previous cars seemed to just gently lose speed (by coasting?) until the lower set speed is achieved. I know the F30 (as well as other models) has 'Brake Drying' so seems it can apply the brakes when it feels the need. __________________ Life is a state of mind
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04-13-2013, 03:25 AM	#2
venkata Lieutenant 27 Rep 583 Posts Drives: F30 330e MSport Join Date: Jan 2013 Location: Lancashire iTrader: (0)	I hope so, only noticed the brake effect the other day. I thought it would cruise to the lower speed but found it braked quite hard. Don't think i'll do that next time as i could annoy the person behind me for unnecessary braking when there is no obstruction in front. __________________ Driving: F30 330e // /M-Sport \| Mineral Grey \| Coral Red Leather \| M Sport Plus Pack \| Media Pro Plus Pack \| Active Security Pack \| Adaptive LED Lights \| Advanced Parking Pack \| Interior Comfort Pack \| Enhanced Bluetooth with Wireless Charging\| Black Performance Grill \| Heated Seats \| Heated Steering \| Speed Limit Display
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04-13-2013, 03:33 AM	#3
Doc943 Private First Class 13 Rep 174 Posts Drives: F30 320d SE Join Date: Oct 2012 Location: East Yorkshire iTrader: (0)	Yes they do. I set my CC to 30 mph down a very long, winding and steep hill near Whitby and could see the brake light reflection in the road signs and car behind. Quite a surreal experience not braking and putting my trust in some electronics!
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04-13-2013, 12:04 PM	#4
edz_f06 Lieutenant 43 Rep 412 Posts Drives: F06 640d MSport Join Date: Nov 2012 Location: Cumbria, England iTrader: (0)	Yes it definitely does put the brake lights on when the CC is slowing the car down a lot. Also you can feel it is using the brakes if you then want to slow down even more as the pedal travels very little (!) before major stopping power of the brakes!! __________________ F06 640D Gran Coupe M Sport+ Alpine White with Black Nappa Previous: F31 320D M Sport Touring Mineral Grey / Coral Red
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04-14-2013, 10:58 AM	#5
SomeRandomer123 Colonel 306 Rep 2,612 Posts Drives: F30 328i Luxury - Sport Auto Join Date: May 2011 Location: Lancashire, North West England, UK iTrader: (0)	Yep, we have Cruise Control With Brake Function. __________________ 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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07-12-2013, 09:59 AM	#6
Edtheted Edtheted 17 Rep 103 Posts Drives: 2017 X1 1.8 sDrive xLine auto Join Date: Jul 2013 Location: Bath UK iTrader: (0) Garage List 2017 X1 Sdrive Xlin ... [0.00]	Also do the brake lights flash when you do an emergency stop like the Mercs do?
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07-12-2013, 10:32 AM	#8
Edtheted Edtheted 17 Rep 103 Posts Drives: 2017 X1 1.8 sDrive xLine auto Join Date: Jul 2013 Location: Bath UK iTrader: (0) Garage List 2017 X1 Sdrive Xlin ... [0.00]	Thank, how come BMW aren't using LED stop/winker lamps anymore like the e90s used to?
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