When the ACC is in operation and it detects a car in front driving more slowly, it will slow the car down until it matches the speed of the car in front. 

 

Question : Is it the reduction in engine speed that slows the car or does the car apply the brakes? And if the latter, do the brake lights get activated?

It uses everything.

Engine braking, gear changes and regular brakes (with brake lights).

I think it also depends how quickly it needs to slow your car down. If it can manage with just engine braking it does just that, but if a quicker slowing down is required it does use the brakes as well and the brake lights do come on.

 

Not sure on the older Superb model like the 2016 you have but on my 2023 MY I can see on the infotainment system whether my brake lights are on or off so I've checked while driving along a few times,  during a gentle slowing down no brake lights but when a quicker deceleration is required and you can feel the brakes being applied the brake lights are shown as being on.

The engine braking is actually very subtle in my 1.5 TSI DSG, probably due to a fact they wanted to achieve a very low rolling resistance overall.

 

So when using ACC the car will actually use brakes a lot.

Yeah, engine braking is effectively non-existent on our 280. 

I didn't have it in my Octavia but it works exceptionally well on my GTE.  It does apply the brakes if needed but mostly uses the regen.  I understand this is limited to the hybrid variants but the usage is so smooth.  I used it in a work hire car (corolla estate) which was also a hybrid and it again worked quite well.  Didn't have it long enough to work out if it used the brakes.  Can only assume it would given the opportunity.

If your foot is touching (literally touching, not pressing) the brake pedal you can feel it moving away from your foot. The car will slow all the way down to stopping. Won’t automatically start again if traffic moves off but I think a nudge of the throttle gets it moving again. 

10 minutes ago, travs said:

. Won’t automatically start again if traffic moves off but I think a nudge of the throttle gets it moving again. 

 

Throttle bit is correct. Not moving off is nearly correct. Mine will move off if the car in front moves soon enough after mine stops. Not sure on how long but it's definitely not longer than a few seconds. Maybe 3. 

13 minutes ago, MarkyG82 said:

 

Throttle bit is correct. Not moving off is nearly correct. Mine will move off if the car in front moves soon enough after mine stops. Not sure on how long but it's definitely not longer than a few seconds. Maybe 3. 

 

It is definitely 3 secs.

 

If only there was a way to extend this time to b a much longer time, like 10 secs or so.

Coding it longer would be awesome. 

Cheers for that - good to know 👍

8 hours ago, JR RS said:

 

It is definitely 3 secs.

 

If only there was a way to extend this time to b a much longer time, like 10 secs or so.

On the face lift mk3 it is something like 12-15 seconds, not exactly sure without timing it, so perhaps there is a way to alter this on the pre-facelift?

1 hour ago, cnc said:

On the face lift mk3 it is something like 12-15 seconds, not exactly sure without timing it, so perhaps there is a way to alter this on the pre-facelift?

 

i believe u r referring to the adaptive lane assist guidance - this holds the lane for u, however u get a ding every 12 secs.  

the 12 sec lane assist time can be changed via parameter changes to the Gateway module.  I've had mine recently changed (when i had the gateway updated for the DCC mod) from 12 sec to 60 secs.  

as a result, i can go for 60 secs without needing to touch my steering wheel, and

as a result, my Traffic Jam Assist (lane guidance + ACC) operates handsfree for up to 60 secs before i have to touch the wheel.

 

this is however different to wat is being discussed above.

 

the setting for the ACC 3 sec resumption is deep within the parameters, and not something that is accessible via coding.

as far as i know - no one has been able to crack/change this setting, be it VW, Audi or Seat models.

Edited 6 September, 20232 yr by JR RS

10 hours ago, JR RS said:

 

It is definitely 3 secs.

 

If only there was a way to extend this time to b a much longer time, like 10 secs or so.

You can quite easily start it again to move off, just by pulling the ACC stalk towards you or a slight press on the accelerator. 

30 minutes ago, clarksonline said:

You can quite easily start it again to move off, just by pulling the ACC stalk towards you or a slight press on the accelerator. 

 

Yup, I'm well aware of that.

10 hours ago, JR RS said:

 

i believe u r referring to the adaptive lane assist guidance - this holds the lane for u, however u get a ding every 12 secs.  

the 12 sec lane assist time can be changed via parameter changes to the Gateway module.  I've had mine recently changed (when i had the gateway updated for the DCC mod) from 12 sec to 60 secs.  

as a result, i can go for 60 secs without needing to touch my steering wheel, and

as a result, my Traffic Jam Assist (lane guidance + ACC) operates handsfree for up to 60 secs before i have to touch the wheel.

 

this is however different to wat is being discussed above.

 

the setting for the ACC 3 sec resumption is deep within the parameters, and not something that is accessible via coding.

as far as i know - no one has been able to crack/change this setting, be it VW, Audi or Seat models.

I don't have lane assist on my UK spec SEL (Style) model.

 

I am referring to the adaptive cruise control (ACC) bringing my car to a complete stop when the vehicle stops in front, it will automatically drive on again if the vehicle in front moves within 13 seconds of coming to a complete stop. My last car did the 3 seconds, the face lift gets 13 seconds before any intervention is required.

 

 

4 hours ago, cnc said:

I don't have lane assist on my UK spec SEL (Style) model.

 

I am referring to the adaptive cruise control (ACC) bringing my car to a complete stop when the vehicle stops in front, it will automatically drive on again if the vehicle in front moves within 13 seconds of coming to a complete stop. My last car did the 3 seconds, the face lift gets 13 seconds before any intervention is required.

 

 

 

My apologies - I didn't realise that the facelift Superb can wait 12-13 secs to automatically resume.

That's excellent!

 

Ur the first person I've read mentioning this.

 

Makes sense though given the facelift Superb uses a different radar (2Q0) compared to the 3Q0 radar in the pre-facelift.

 

And i'm pretty sure a version with Travel Assist - as long as you still keep touching the steering wheel, can be on "standby" even longer.

I heard of people saying if you twitch the wheel it does something.  Pretty sure mine does nothing.

If this helps I have a facelift 2.0TSI  and the wait behind a stationary car in ACC is about 3 secs. 

20 hours ago, JR RS said:

 

My apologies - I didn't realise that the facelift Superb can wait 12-13 secs to automatically resume.

That's excellent!

 

Ur the first person I've read mentioning this.

 

Makes sense though given the facelift Superb uses a different radar (2Q0) compared to the 3Q0 radar in the pre-facelift.

 

No need for an apology, things can & do change and Briskoda is a great place for all of us to find out those changes and tweaks.

 

Further to my original post it does drop out after 3 seconds if the stop/start is active, so when the engine stops the ACC drops out which is understandable.

 

Perhaps I should have mentioned I often turn stop/start off when I get in the car and it seems to be this that then gives the extended time the ACC remains engaged, I tried to time it in my head today while stopped with the engine running and it is somewhere in the region of 10-13 seconds (roughly!). I'll try to get an exact time when conditions permit.

12 minutes ago, Stonechip said:

If this helps I have a facelift 2.0TSI  and the wait behind a stationary car in ACC is about 3 secs. 

Turn off the stop/start option so the engine remains running and see if it gives you an extended 'standby' time. On mine doing this increases the time the ACC remains active while stationary. 

9 hours ago, cnc said:

No need for an apology, things can & do change and Briskoda is a great place for all of us to find out those changes and tweaks.

 

Further to my original post it does drop out after 3 seconds if the stop/start is active, so when the engine stops the ACC drops out which is understandable.

 

Perhaps I should have mentioned I often turn stop/start off when I get in the car and it seems to be this that then gives the extended time the ACC remains engaged, I tried to time it in my head today while stopped with the engine running and it is somewhere in the region of 10-13 seconds (roughly!). I'll try to get an exact time when conditions permit.

 

 

with the pre-facelift, on mine at least, having the start-stop active or not makes no difference - it is 3 secs for ACC to auto resume.

 

i mostly drive around with Start-Stop inactive as its annoying in start stop traffic.

 

i'm used to it now.

i'm glad i got the lane assist duration changed from 12 secs to 60 secs
would highly recommend it to anyone.

18 hours ago, cnc said:

Turn off the stop/start option so the engine remains running and see if it gives you an extended 'standby' time. On mine doing this increases the time the ACC remains active while stationary. 

Just tried your suggestion  and turned off stop/start sadly made no difference , counted 6 secs stationary and had to "dab" the accelerator to move on. 

13 minutes ago, Stonechip said:

Just tried your suggestion  and turned off stop/start sadly made no difference , counted 6 secs stationary and had to "dab" the accelerator to move on. 

I’ve got the stop/start defeat module and it doesn’t make a difference to the ACC stop time either. @JR RS, you’re a brave man using lane assist for steering the car for 60 seconds; even at low speed I wouldn’t trust it.