Hi,

When using ACC on bust motorway it will nicely move in slow traffic and if necessary stop, apply parking break and then engine stop start kicks in.

When traffic moved again the engine restarts but car won't move until I hit resume.

Is this normal?

Also, anyone know why it keeps pace with your lane or the one to the right if slower? Irritating if filtering off somewhere.

Yes perfectly normal, it will only pull away by itself if you have been stopped for I think it’s 3 seconds.

 

It’s to stop you undertaking another vehicle, if you want to override it then gently press the throttle and it will then undertake the vehicle (once you have pressed the throttle you can take your foot off again)

When traffic moves again, you can either resume ACC or press accelerator slightly to get the car to move again. This is normal and I guess it is a safety feature, which makes perfect sense to me.

But my car keeps pace with the lane I'm in and never the one on the right, even if it is slower.

Sent from my Nexus 6 using Tapatalk

There Is a huge thread about undertaking and driving abroad that explores the issue of being on a faster inside lane somewhere on here.

Yes perfectly normal, it will only pull away by itself if you have been stopped for I think it’s 3 seconds.

 

Are you saying if you've stopped for more than 3 seconds it will restart or only if you're stopped for less than 3 seconds?

My engine restarts immediately but I have not waited long enough after traffic moves for the car to pull away again on its own. Drivers around here just aren't that patient!

Part of the pause may also be a safety check because I have noticed that the engine will sometimes restart after the vehicle in front of the one directly in front of me moves. I can only assume there is a multi-path return from the radar system meaning it is actually seeing more than one stationary vehicle ahead. If it reacted to the wrong car you could smash into the one ahead instead!

Edited 2 May, 201610 yr by FelisBengalensis

My ACC (Traffic Assist) does one of two things in stop start traffic: 

 

If Stop/Start is disabled, the car will stop, and after a few seconds a message 'ACC ready to start' will appear on the bottom of the screen. A dab of the accelerator will enable the car to resume following the vehicle in front. 

 

If the Start/Stop is enabled and the car comes to a halt, the engine will cut out as usual. If the car in front moves off, the engine starts itself (as a prompt for the driver I presume!) and again, a dab of the accelerator pedal enables the car to resume following the vehicle in front. 

 

This is a safety measure to ensure the system receives an input from the driver to ensure it is safe to restart the ACC system, as it's not a fully automated system by definition. It requires constant supervision from the driver at all times. I don't know what the official threshold actually is. There is no defined time in the manual but three seconds sounds realistic to me. 

 

The anti undertaking mode only works in traffic above a certain speed (not sure what the threshold is, will have to check it next time). Another little Skoda appears in the offside part of the lane assist/ACC status page of the Maxidot. This prevents the ACC from allowing an undertake manoeuvre on a slower moving vehicle in the outside/offside lane. 

 

This has caught me out on a dual carriageway where someone is in the outside lane to turn right. I'm in lane one and my car decelerates and then brakes to prevent this undertake manoeuvre. A dab of the accelerator cures this problem but it can catch you out if you aren't on the ball - especially if Mr Repmobile basic Audi man is right up 'yer chuff!

 

The radar's field of view is fairly narrow at shorter distances and progressively widens in proportion to the distance ahead of the car. It will only monitor what is directly in front at low speeds when the car in front is close. It can also misinterpret things on sharper curves in the road if there is something in the other lane. 

On a slightly related note, what's the difference with using ACC with manual or DSG? For instance, can you change gear in the manual without it cancelling the ACC, as it does with regular cruise control? I've ordered a manual so I'm curious what the differences will be. Incidentally, I would've really liked a DSG but finances mean it will have to wait for next time, hopefully, as it would've pushed the monthly payments up too high for my budget.

On my previous Superb with standard cruise, dipping the clutch pedal used to switch it off, along with the brake pedal of course.

 

On MQB cars like the Mk3 Octavia and Superb. The cruise is NOT cancelled when the clutch pedal is depressed. This allows for gear changes with the cruise control engaged. 

Ok good, thanks. I assumed that must be the case, otherwise it seems to defeat the whole point of the ACC! I have a Mk2 Octy so I'm used to having to reset every time some spanner pulls out in front of me - looking forward to not doing that anymore.

What about in traffic? Do the manual and DSG versions work the same (aside from manual gear changes of course)?

Edited 3 May, 201610 yr by maffyou

Ok good, thanks. I assumed that must be the case, otherwise it seems to defeat the whole point of the ACC!

What about in traffic? Do the manual and DSG versions work the same (aside from manual gear changes of course)?

The Traffic Assist is only available with the DSG box due to it's ability to stop and go with no manual input from the driver, bar the little tap on the throttle to effectively authorise the system to pull away. 

 

With the manual gearbox, the cruise will cut out when the brake pedal is applied. The (DSG) Traffic Assist can brake to a complete standstill by itself. 

I thought that was probably the case - thanks

No problem 

 

Good luck with the new car - when it arrives  :yes: