Hello! I have an Octavia MK3 2018 Style version in Turkey. We are trying to implement an ACC system for my car. We couldn't figure out why the system doesn't make the car completely stop. It turned itself off at under 20 km/h. My car has hill assist, which allows it to hold the car in place for 3-4 seconds. I think it uses the same logic for a complete stop in ACC. Could you help me with configuring the system in VCDS? Thank you.

I think you will find that this is exactly how the ACC is designed to work, even though it seems stupid. We have a Golf with the same system and the Owners Manual clearly states that the ACC will not bring the car to a complete stop but will disengage at 20 km/h or below. The "Front Assist" however does operate at below 20 km/h and will apply emergency braking to avoid collision - though I would seriously avoid relying on it. The two systems are separate and switch over at about 20 km/h. I agree it's crazy but that's the way VAG designed it. I doubt that you will be able to do anything about it with VCDS and remember if you try to you are interfering with the cars so-called safety systems which may be dangerous !

22 hours ago, BazzY said:

I think you will find that this is exactly how the ACC is designed to work, even though it seems stupid.

The ACC on my 2016 L&K works down to a stop when it asks me to press the brake pedal to disengage it.

Later models have PACC which even works when stationary and can restart when the vehicle in front moves.

I can't help with coding, but agree ACC will bring my 2019 VRS to a complete stop and then requires you to take over with the brake pedal as it holds stationary for only a few seconds. You can reactivate immediately when you start moving again, but it is obviously missing the electronic handbrake that other MQB models have for longer holds.

The Golf experience sounds odd to me, is that actual observed behaviour and is it a manual transmission? For an automatic, I'd anticipate that you might not be able to set a target speed below 20km/h, but ACC would still slow the car below 20km/h and maintain crawling speed if traffic necessitates it, as that would match the Octavia.

6 hours ago, simion_levi said:

The Golf experience sounds odd to me, is that actual observed behaviour and is it a manual transmission? For an automatic, I'd anticipate that you might not be able to set a target speed below 20km/h, but ACC would still slow the car below 20km/h and maintain crawling speed if traffic necessitates it, as that would match the Octavia.

Yes you are right, if its a DSG it will take you to a crawl in traffic and then back up to the speed setpoint only needing a jab of the accelerator pedal if you come to a complete stop to resume the ACC.

The manual however does not do this presumably because plodding around at slow speeds would mean you would be changing gear like a maniac

So it depends on whether it's manual or DSG transmission ! And possibly also on trim level and year of manufacture, - Very reassuring for those who have to jump from car to car and just drive off I don't think !!! Well done VAG !