GolfGTIforum.co.uk

Model specific boards => Golf mk7 => Topic started by: sadsac on 05 October 2017, 11:44

Title: Anyone find ACC brakes very late?
Post by: sadsac on 05 October 2017, 11:44
As per the subject really, I find the adaptive cruise control ACC brakes far later and harder than i usually would and always makes me nervous (I use it a lot - M25!), this is irrespective of the distance-from-car-in-front setting...  or maybe i just drive like a ninny?! This is in a 2016 GTD in the UK...

Anyone else or just me?? I assume there's nothing I can do to change this via my OBDeleven?!

EDIT - Have googled and searched and this doesnt seem to have come up before
Title: Re: Anyone find ACC brakes very late?
Post by: Vwjap on 05 October 2017, 11:57
Sometimes I find it the same, but I bottle out and take over braking
Title: Re: Anyone find ACC brakes very late?
Post by: fredgroves on 05 October 2017, 13:16
Have you got acc set to sport by any chance?
Title: Re: Anyone find ACC brakes very late?
Post by: itavaltalainen on 05 October 2017, 14:57
Worth checking driving profile, in eco it lifts off / brakes earlier.

Worth noting though that the sensor range is fairly limited with the flat sensor - which is also the reason for it being limited to 100mph. If you come up to the end of a slow moving queue on motorway doing 70 it does brake very late (usually pause it and roll along and re-activate when I am closer).
Title: Re: Anyone find ACC brakes very late?
Post by: I wanted a GTi on 05 October 2017, 17:55
It was designed by an ex BMW now Audi engineer  :whistle:
Title: Re: Anyone find ACC brakes very late?
Post by: sadsac on 06 October 2017, 14:24
Sometimes I find it the same, but I bottle out and take over braking

Makes me feel better - not just me then! I often end up doing exactly this
Title: Re: Anyone find ACC brakes very late?
Post by: sadsac on 06 October 2017, 14:27
Have you got acc set to sport by any chance?

No, but thanks for the suggestion. I usually use Drive. Sometimes use Eco as I like the way it shifts to neutral and idles when off the throttle. Never use Individual. Obviously use Sport when wanting more shove but not that often in the daily commuter crawl!
Title: Re: Anyone find ACC brakes very late?
Post by: sadsac on 06 October 2017, 14:29
Worth checking driving profile, in eco it lifts off / brakes earlier.

Worth noting though that the sensor range is fairly limited with the flat sensor - which is also the reason for it being limited to 100mph. If you come up to the end of a slow moving queue on motorway doing 70 it does brake very late (usually pause it and roll along and re-activate when I am closer).

I'll compare Drive to Eco and see, thanks. I'll also give your suggestion re pausing it a try too cheers - sounds a decent compromise (not that one should be needed!)
Title: Re: Anyone find ACC brakes very late?
Post by: sadsac on 06 October 2017, 14:29
It was designed by an ex BMW now Audi engineer  :whistle:

Very good!... made me laugh :-)
Title: Re: Anyone find ACC brakes very late?
Post by: I wanted a GTi on 06 October 2017, 17:06
It was designed by an ex BMW now Audi engineer  :whistle:

Very good!... made me laugh :-)

   :smiley:
Title: Re: Anyone find ACC brakes very late?
Post by: gtidsgmk7 on 12 October 2017, 16:40
New owner of a mk7 here, upgraded from a mk5 and ACC was one of the main selling points for me as I do M25,A40 into London. Stop start on the motorway I find it excellent and really makes it easier. I put it into Eco and the furthest distance and handles it all well.

80mph 70mph down to stop is a bit hairy though as it doesn't anticipate so I sometimes take over for that. 
Title: Re: Anyone find ACC brakes very late?
Post by: Sootchucker on 12 October 2017, 16:51
About the only thing that bugs me about the ACC is the gap it leaves to the car in front. I know the gap is set by a combination of speed and minimum braking distance requirements, but I tend to find that others are using the "gap" to sneak into causing the car to brake or further slow down.

I know it's only trying to protect me, so I'll have to live with it, but apart from that, I think it's brilliant especially with DSG and the fact that it's standard fit. For me though, I find the biggest use of the "system" is the speed limiter. With so many speed cameras round my way, I've got in the habit of setting the speed limiter to either 32 or 42mph (depending on what road I'm on) when I first start my journey to work in the morning, to ensure i'm not collecting any points for speeding, as It's quite easy to go in modern cars.
Title: Re: Anyone find ACC brakes very late?
Post by: I wanted a GTi on 12 October 2017, 22:09
I drive in sport mode all the time and have ACC set to Audi mode.
Title: Re: Anyone find ACC brakes very late?
Post by: Don76 on 13 October 2017, 08:38
I use mine every day. I find that quite often in stop start traffic it'll slam the brakes on whilst crawling along at 5mph.

Another annoying part is when you're waiting for the car in front to return to the left lane before overtaking. The ACC waits a long time before getting back on the gas to pick up speed.
Title: Re: Anyone find ACC brakes very late?
Post by: charlie_cc on 13 October 2017, 09:34
I use the ACC about 90% of the time on my commute to work. I'm in a manual so I can't comment on the start and stop.

I think it's excellent, takes some of the stress out of driving, particularly when it's bad visibility (fog etc).

I have experienced all of the above. On the rare occasion it does late break, it's a bit unnerving, but I manage to fight the instinct to break most of the time, but sometimes I have to intervene.

The space invaders are annoying, but not much you can do there.

When a car pulls back to the left lane, a dose of the right foot mitigates the delay on the ACC picking up the speed.

I find it's worst behaviour to be picking up a car that pulls in front from the left lane, in terms of it's reaction times. It won't register on the graphic there's a car in front until it's almost fully over, and it won't start to break until that point either. This is where I have to intervene most.
Title: Re: Anyone find ACC brakes very late?
Post by: fredgroves on 13 October 2017, 10:18
The ACC radar coverage is better on the Mk7.5, it sees much wider. You don't get nearly so many undetected scenarios.
Title: Re: Anyone find ACC brakes very late?
Post by: I wanted a GTi on 13 October 2017, 10:32
The ACC radar coverage is better on the Mk7.5, it sees much wider. You don't get nearly so many undetected scenarios.

And it stops you undertaking another car, Mk7 only did that when you were driving on the continent.
Title: Re: Anyone find ACC brakes very late?
Post by: Don76 on 13 October 2017, 20:03
The ACC radar coverage is better on the Mk7.5, it sees much wider. You don't get nearly so many undetected scenarios.

And it stops you undertaking another car, Mk7 only did that when you were driving on the continent.

A quick tap of the throttle soon over-rides this tho.
Title: Re: Anyone find ACC brakes very late?
Post by: Daz Auto on 14 October 2017, 10:50
I find the Mk7.5 ACC brakes late when there is a big difference in speed. It did this on me twice. Now I just know to take over.

It is also a bit slow at keeping up if the traffic in front accelerates relatively fast. So again, slow to react to a speed difference.

Not sure what mode it is in. :embarrassed:

In general, it seems to recognise more situations correctly than the ACC in our A3.

On another topic: I was reversing up to a laurel hedge yesterday. I knew it would not damage the car so was going to reverse right up to it. THE CAR stopped dead, about a foot away. So that's the emergency brake assist tested! :huh: :grin:

Also, I love the way the front parking sensors automatically activate when I get close to something. :cool:
Title: Re: Anyone find ACC brakes very late?
Post by: eatontrifles on 15 October 2017, 00:00
On another topic: I was reversing up to a laurel hedge yesterday. I knew it would not damage the car so was going to reverse right up to it. THE CAR stopped dead, about a foot away. So that's the emergency brake assist tested! :huh: :grin:
I recall seeing that mentioned in the manual, below a certain speed when reversing (5mph rings a bell) the parking sensors will stop the car. I haven't been brave enough to try it yet.  :grin:
Title: Re: Anyone find ACC brakes very late?
Post by: fredgroves on 15 October 2017, 12:37
Yes the parking sensors do brake if you have that enabled... I reverse down a slope to the road and it thinks the road is an obstacle... Crunch go the brakes... Have to remember to disable the parking sensors when doing that...

As for acc accelerating slowly, select individual mode and turn acc to sport... A lot more acceleration if you want it.
Title: Re: Anyone find ACC brakes very late?
Post by: sadsac on 16 October 2017, 20:37
About the only thing that bugs me about the ACC is the gap it leaves to the car in front. I know the gap is set by a combination of speed and minimum braking distance requirements, but I tend to find that others are using the "gap" to sneak into causing the car to brake or further slow down.

This annoys me too and is the main reason why I have the setting for the gap on the minimum level of 1 bar
Title: Re: Anyone find ACC brakes very late?
Post by: Vwjap on 16 October 2017, 21:31
Needs a Audi setting
Title: Re: Anyone find ACC brakes very late?
Post by: Guzzle on 16 October 2017, 23:19
Yes we need an ACC equivalent on the rear that keeps cars behind at a set distance!
Title: Re: Anyone find ACC brakes very late?
Post by: fredgroves on 17 October 2017, 10:35
Yes we need an ACC equivalent on the rear that keeps cars behind at a set distance!

Actually, you can used to be able to get rear assist which detects vehicles approaching from behind - I thought it was Lane Assist Plus that did it, but can't find it on the configurator now.

I think it worked with a rear view camera able to spot Audi badges.
Title: Re: Anyone find ACC brakes very late?
Post by: Excession_OCP on 18 October 2017, 19:58
Yes the parking sensors do brake if you have that enabled... I reverse down a slope to the road and it thinks the road is an obstacle... Crunch go the brakes... Have to remember to disable the parking sensors when doing that...

As for acc accelerating slowly, select individual mode and turn acc to sport... A lot more acceleration if you want it.

Out of interest, how do you enable the parking sensors braking thing?

Ta!
Title: Re: Anyone find ACC brakes very late?
Post by: fredgroves on 19 October 2017, 09:00
In the car setttings, parking and manoeuvring, enable manoeuvre braking.

Mine's a Mk7.5, I can't remember if the 7 did it...
Title: Re: Anyone find ACC brakes very late?
Post by: Excession_OCP on 20 October 2017, 00:03
In the car setttings, parking and manoeuvring, enable manoeuvre braking.

Mine's a Mk7.5, I can't remember if the 7 did it...

Do you have park assist as an option?  I have a 7.5 too but the only option I have in that menu is to enable the parking sensors and the associated volume.  I don't have park assist fitted.
Title: Re: Anyone find ACC brakes very late?
Post by: fredgroves on 20 October 2017, 08:49
Nope, no park assist.

Its definitely there!
Title: Re: Anyone find ACC brakes very late?
Post by: Jeni_R_ on 20 October 2017, 09:35
Yes the parking sensors do brake if you have that enabled... I reverse down a slope to the road and it thinks the road is an obstacle... Crunch go the brakes... Have to remember to disable the parking sensors when doing that...

As for acc accelerating slowly, select individual mode and turn acc to sport... A lot more acceleration if you want it.

ahhhhhhhh light bulb moment, i was trying to work this out to as i was taking over acceleration when ACC was on because took ages to get back up to speed thanks Fred - hope you are well  :wink:
Title: Re: Anyone find ACC brakes very late?
Post by: fredgroves on 20 October 2017, 12:03
Cheers Jeni - everything's cool apart from old age having a whack at me.

I love ACC but its always something you have to be prepared to over ride and you can, which is lovely.

Its definitely improved on my 7.5 vs the 7 though. Much more intelligent now.
Title: Re: Anyone find ACC brakes very late?
Post by: Excession_OCP on 20 October 2017, 18:33
Nope, no park assist.

Its definitely there!

How odd! Do you have any options fitted? It's not there for me, I've checked, double-checked and triple-checked!
Title: Re: Anyone find ACC brakes very late?
Post by: fredgroves on 21 October 2017, 10:04
Nav pro is the only thing I have.

The option is right at the bottom... Make sure you scroll down...

The only other thing is mine is MY18... I think that some 7.5's were made before MY18. When did you get yours?
Title: Re: Anyone find ACC brakes very late?
Post by: andy28 on 21 October 2017, 13:31
I think you may have hit the nail on the head with the model years but let's see what Excession_OCP says. My 7.5 gti was an early batch (pre-fog variety) and mine doesn't have this option either...
Title: Re: Anyone find ACC brakes very late?
Post by: Excession_OCP on 22 October 2017, 12:19
I think you may have hit the nail on the head with the model years but let's see what Excession_OCP says. My 7.5 gti was an early batch (pre-fog variety) and mine doesn't have this option either...

That could be the issue! Mine's a 17 plate 7.5 GTD - it does have the fogs but appears to be too early to have the parking sensor brake function. Damn the inexorable march of time and technological progress!  :grin:
Title: Re: Anyone find ACC brakes very late?
Post by: fredgroves on 23 October 2017, 08:53
Shame you can't flash it to add this. It's only a minor software feature using hardware that's been there for years
Title: Re: Anyone find ACC brakes very late?
Post by: I wanted a GTi on 25 October 2017, 09:51
Nav pro is the only thing I have.

The option is right at the bottom... Make sure you scroll down...

The only other thing is mine is MY18... I think that some 7.5's were made before MY18. When did you get yours?

Is it possible that the car that stops has dsg and the one that doesn't is manual?
Title: Re: Anyone find ACC brakes very late?
Post by: andy28 on 25 October 2017, 10:03
Mine is a DSG but doesn't have it. I'm off to the dealers later so will see what they say. Andy
Title: Re: Anyone find ACC brakes very late?
Post by: fredgroves on 25 October 2017, 10:31
Nav pro is the only thing I have.

The option is right at the bottom... Make sure you scroll down...

The only other thing is mine is MY18... I think that some 7.5's were made before MY18. When did you get yours?

Is it possible that the car that stops has dsg and the one that doesn't is manual?

Nope, mine is manual...
Title: Re: Anyone find ACC brakes very late?
Post by: Jim_mk7.5 on 25 October 2017, 11:00
In the car setttings, parking and manoeuvring, enable manoeuvre braking.

Mine's a Mk7.5, I can't remember if the 7 did it...

Had this happen a couple of times, reversing and it thought I was going to hit something and applied the brakes! Didn't realise this was a function...   :whistle:
Title: Re: Anyone find ACC brakes very late?
Post by: fredgroves on 25 October 2017, 11:51
In the car setttings, parking and manoeuvring, enable manoeuvre braking.

Mine's a Mk7.5, I can't remember if the 7 did it...

Had this happen a couple of times, reversing and it thought I was going to hit something and applied the brakes! Didn't realise this was a function...   :whistle:

Its enabled by default!
Title: Re: Anyone find ACC brakes very late?
Post by: eatontrifles on 25 October 2017, 14:28
I don't have the option available either. 7.5, DSG, delivered mid May 2017.
Title: Re: Anyone find ACC brakes very late?
Post by: fredgroves on 25 October 2017, 15:25
I don't have the option available either. 7.5, DSG, delivered mid May 2017.

MY18 is build date May 29th onwards... so yours is a 7.5 MY17, which doesn't have it.
Title: Re: Anyone find ACC brakes very late?
Post by: I wanted a GTi on 25 October 2017, 17:15
How does it brake the manual? The car would just konk out.
Title: Re: Anyone find ACC brakes very late?
Post by: fredgroves on 25 October 2017, 17:21
How does it brake the manual? The car would just konk out.

With brakes? It sort of crunches to a hault... can't remember it stalling
Title: Re: Anyone find ACC brakes very late?
Post by: I wanted a GTi on 25 October 2017, 17:32
How does it brake the manual? The car would just konk out.

With brakes? It sort of crunches to a hault... can't remember it stalling

Had an idea it would use the brakes Fred, the force field I heard is being held back for the Mk8 :grin:

I meant how does it brake the car without stalling it.
Title: Re: Anyone find ACC brakes very late?
Post by: fredgroves on 25 October 2017, 17:46
I guess when I hear the crunch I drop the clutch and brake anyway, natural reaction for a driver of many decades and millions of miles... I'd imagine my mother would stall it though lol
Title: Re: Anyone find ACC brakes very late?
Post by: I wanted a GTi on 25 October 2017, 17:52
I guess when I hear the crunch I drop the clutch and brake anyway, natural reaction for a driver of many decades and millions of miles... I'd imagine my mother would stall it though lol

Get you now.