ACC and/or LaneAssist user experiences

serdar_18fr

Active Member
May 29, 2021
334
1
195
Hello everyone,

I'm about to decide on retrofitting radar and camera hardware to my 2018 Leon FR, so I could activate FrontAssist, ACC, Lane Assist, High Beam Assist and Traffic Sign Recognition features.

What I would like to know is whether there are some annoying side effects that come with these technologies.
For example, did anybody experience any false positives from radar and unexpected hard-braking caused by that?
Or any minor/major dangerous situations caused by Lane Assist forcing you to stay in the lane, maybe while you were making an emergency maneuver?

Any response will be greatly appreciated.
Thanks in advance and best regards,

Serdar
 

niallain

Active Member
Apr 9, 2017
273
53
Cardiff
Never had any random braking from from ACC.
Lane assist hasn't been too bad, it turns off briefly whilst you indicate to change lanes, but if you make a lane change without indicating you definitely need to fight against the steering wheel but it won't "deny" you from your maneuver. Lane assist seems to come on around 38mph+ so it's not a concern around town.

I really like high beam assist, sometimes it can be a little slow to come back on after switching off due to an oncoming car.
Only annoyances with it is gaps in oncoming traffic, so it turns off for an oncoming car, turns back on and then another car comes around the corner instantly so it turns back off but it looks like you're flashing the oncoming driver.

Traffic sign recognition is generally very accurate, I also have the visual warning enabled when I reach 9mph above the detected limit as a reminder. (Configurable at 3, 6, 9 and 12mph over the limit)
 

serdar_18fr

Active Member
May 29, 2021
334
1
195
Never had any random braking from from ACC.
Lane assist hasn't been too bad, it turns off briefly whilst you indicate to change lanes, but if you make a lane change without indicating you definitely need to fight against the steering wheel but it won't "deny" you from your maneuver. Lane assist seems to come on around 38mph+ so it's not a concern around town.

I really like high beam assist, sometimes it can be a little slow to come back on after switching off due to an oncoming car.
Only annoyances with it is gaps in oncoming traffic, so it turns off for an oncoming car, turns back on and then another car comes around the corner instantly so it turns back off but it looks like you're flashing the oncoming driver.

Traffic sign recognition is generally very accurate, I also have the visual warning enabled when I reach 9mph above the detected limit as a reminder. (Configurable at 3, 6, 9 and 12mph over the limit)

Thank you very much for the quick & detailed answer. 🙏
Cheers,
Serdar.
 

DigitalSushi

Active Member
Sep 7, 2020
146
67
Dont know about the seat version but the Lane assist in every other car has been horrible to drive with. I do not know anyone that doesn't hate it.

I had it in a Honda and every time I went round parked cars the car felt like it was pushing back so i had to put more pressure on the wheel meaning when the lane assist did actually allow me not to crash into the parked car i ended up putting a bit more lock on the wheel than was intended.

It was both highly annoying and very unnerving. Would be disabling straight away if it was in my car.

also just be aware that the radar unit may need an expensive calibration, I knocked mine a few mm out of alignment when having a small excursion through a ditch in Scotland. The quotes i was getting were about the £200 mark. fortunately it managed to sort itself out somehow so i never had to pay for it. but you might want to check that cost in your plan
 
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serdar_18fr

Active Member
May 29, 2021
334
1
195
Dont know about the seat version but the Lane assist in every other car has been horrible to drive with. I do not know anyone that doesn't hate it.

I had it in a Honda and every time I went round parked cars the car felt like it was pushing back so i had to put more pressure on the wheel meaning when the lane assist did actually allow me not to crash into the parked car i ended up putting a bit more lock on the wheel than was intended.

It was both highly annoying and very unnerving. Would be disabling straight away if it was in my car.

also just be aware that the radar unit may need an expensive calibration, I knocked mine a few mm out of alignment when having a small excursion through a ditch in Scotland. The quotes i was getting were about the £200 mark. fortunately it managed to sort itself out somehow so i never had to pay for it. but you might want to check that cost in your plan

Thank you very much for your response.

Actually I've been enjoying my car as it is, without any of those features, but I like having some electronic toys in my car and I don't mind paying for them even if I don't use them much. But nobody wants to throw that kind of money, if those features are known to make people's life harder when they do want to use them from time to time, just to get a little pleasure from having the latest tech.

Anyway, I'll be looking for more user experiences before I decide, thanks again 🙏
 

black_sheep

Active Member
Mar 10, 2013
1,256
586
I’ve had systems fitted to two different MQB cars:

Mk3 Octavia VRS - driven in UK/Germany and across EU:

Front Assist
Lane Assist
Standard Cruise
Driver Fatigue
Manual Gearbox
No Sat-Nav / Colour Screen in Dash
(Auto high-beam coded via VCDS)

Mk3.5 Seat Leon Cupra - riven in UK only:

Advanced Comfort and Driving Pack
Safety Pack Plus

=

Front Assist
Lane Assist
Adaptive Cruise
Driver Fatigue
DSG
Sat Nav/Digital Dash
Auto High-beam

I’ve also considered getting this recoded to have PACC (Predictive Adaptive Cruise Control) as per the latest generation cars:


Apologies for the long response, but thought that I’d give an opinion, as there are number of factors to consider.

The Front Assist has worked well on both cars, and prevented me from rear-ending a car in front that started to pull away from a roundabout and stopped for no reason whilst I was observing traffic approaching from the right (UK) - this alone paid for the upgrade in terms of no damage/loss of insurance no claims. You will get the occasional warning if a vehicle is turning from a main road/not fully clear or if approaching a junction where two or more lanes of traffic queuing but the lane that you are travelling is clear.

Lane Assist with ACC the vehicle will continue to self-steer for up to 30 seconds, but only 10 seconds on the previous non-ACC car. This system works far better on the continent where lanes are wider and the road markings are clearer. Where I drive in the UK the lines are poorly marked/worn and thus the car frequently de-activates the Lane Assist. As per opinions above, if you do not indicate the system will fight to keep you in lane, but as per auto-pilot on aircraft, driver input will be able to over-ride the system.

The ACC is ok; in order to make the best of the system it should be mated to the DSG box with the traffic jam assist so that it will brake to a stop/restart (or hit resume if stood still for a while). The driver mode also impacts how quickly the system reacts. ACC works very well in heavy stop/start traffic, through average speed zones or roadworks or light traffic on motorways. It’s not great on the motorway in heavy traffic with cars frequently swapping lanes in front of you. The DSG box doesn’t disengage in ECO mode when ACC is engaged if you are trying to achieve high MPG.

Reviews for PACC are that it cuts in too soon when approaching roundabouts/junctions.

The auto-headlights are ok; as above, they tend not to switch off when approaching the rear of vehicles in front or vehicles with halogen headlights/headlight out.

In summary, both cars had Level 2 Autonomous driving features, and there is improvement between earlier and later generations. Ultimately a nice to have but not essential.
 
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black_sheep

Active Member
Mar 10, 2013
1,256
586
Yes, without any other vehicles around it will act just like the non-ACC cruise.

You activate the ACC and set the speed. You can then set the distance (to the car in front settings 1 shortest > 4 longest) or just keep the default distance (4).
 
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serdar_18fr

Active Member
May 29, 2021
334
1
195
Yes, without any other vehicles around it will act just like the non-ACC cruise.

You activate the ACC and set the speed. You can then set the distance (to the car in front settings 1 shortest > 4 longest) or just keep the default distance (4).

Thanks again.

I guess I'm going to place the order next week and wait for the parts to arrive.
Hope it will go well, without any hitch.
 

daniel_ley

Active Member
Mar 3, 2018
97
35
Dudley
Lane assist seems pretty good in the Leon. I hear plenty of experiences from people who drive other cars and say it's so intrusive they have to turn it off but I've never felt that way in my car, they seem to have it set up just right.

High beam assist is great, but can sometimes be a bit slow to react to oncoming cars so I've ended up being flashed once or twice for blinding someone, but it was more due to the angle of the road which delayed the camera from seeing the oncoming vehicle.

Adaptive cruise control is great and I'm really glad I specced it on my car. Makes long distance journeys a breeze!
 
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Stefan147

Active Member
Jan 29, 2019
193
140
Athens Greece
Hello everyone,

I'm about to decide on retrofitting radar and camera hardware to my 2018 Leon FR, so I could activate FrontAssist, ACC, Lane Assist, High Beam Assist and Traffic Sign Recognition features.

What I would like to know is whether there are some annoying side effects that come with these technologies.
For example, did anybody experience any false positives from radar and unexpected hard-braking caused by that?
Or any minor/major dangerous situations caused by Lane Assist forcing you to stay in the lane, maybe while you were making an emergency maneuver?

Any response will be greatly appreciated.
Thanks in advance and best regards,

Serdar
I've done the exact same retrofits on my Cupra. If your car is a daily then go ahead and do it! Best money I ever spent on the car. Lane assist needs some get use to it but it still works better than most other brands I've tried it on. And keep in mind that I have done the calibration for both the ACC radar and the Lane Assist camera by myself. I guess that if you get it done by a professional with all the necessary tools you will get even better results.

Since you are doing this you may also want to consider Lane change/Blind spot monitoring. Get a pair of Arona mirror glasses and a set of radars from Ali and the connections to the gateway are the same as the acc/camera.
 
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niallain

Active Member
Apr 9, 2017
273
53
Cardiff
Since you are doing this you may also want to consider Lane change/Blind spot monitoring. Get a pair of Arona mirror glasses and a set of radars from Ali and the connections to the gateway are the same as the acc/camera.
Didn't know the Aroma had blind spot monitoring, what's involved with the retrofit?
 
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Stefan147

Active Member
Jan 29, 2019
193
140
Athens Greece
Didn't know the Aroma had blind spot monitoring, what's involved with the retrofit?
Here's a list:

https://www.aliexpress.com/item/328...=glo2esp&spm=a2g0o.9042311.0.0.274263c08mNXKW
https://www.aliexpress.com/item/32922275017.html?spm=a2g0o.9042311.0.0.274263c08mNXKW
https://www.aliexpress.com/item/32966995198.html?spm=a2g0o.9042311.0.0.274263c08mNXKW

Plus a pair of Arona mirror glasses which I'm sure I've mentioned before somewhere and you can probably find with a search.

Only thing is that all these cost me about 250€ about a year ago and now I see that the prices are way up. So someone who's interested may have to consider some used parts from Allegro or ebay. I guess I should also mention that a scan tool like VCDS or OBD11 or VCP is mandatory.
 

serdar_18fr

Active Member
May 29, 2021
334
1
195
I've done the exact same retrofits on my Cupra. If your car is a daily then go ahead and do it! Best money I ever spent on the car. Lane assist needs some get use to it but it still works better than most other brands I've tried it on. And keep in mind that I have done the calibration for both the ACC radar and the Lane Assist camera by myself. I guess that if you get it done by a professional with all the necessary tools you will get even better results.

Since you are doing this you may also want to consider Lane change/Blind spot monitoring. Get a pair of Arona mirror glasses and a set of radars from Ali and the connections to the gateway are the same as the acc/camera.

Thank you very much for your response.
This morning I went to a local specialist shop, ordered the parts and booked a reservation for next Monday.
Not that I desperately need driver assistance stuff but I'm looking forward to have them anyway, I always loved having latest gadgets & tech :)

Also thanks for your suggestion of lane change/blind spot monitoring.
As my next project, I'm considering replacing the factory-fitted digital instrument cluster with the Rev A cluster.
It has two extra views (and maybe some new customizing features, not sure about that)
My car's production date misses the breaking point date (31.07.2018) with just a couple of weeks, where they started to install revised clusters.

After that retrofit, the lane change/blind spot monitoring might be the next project :)

Cheers,
Serdar
 
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niallain

Active Member
Apr 9, 2017
273
53
Cardiff
Here's a list:

https://www.aliexpress.com/item/328...=glo2esp&spm=a2g0o.9042311.0.0.274263c08mNXKW
https://www.aliexpress.com/item/32922275017.html?spm=a2g0o.9042311.0.0.274263c08mNXKW
https://www.aliexpress.com/item/32966995198.html?spm=a2g0o.9042311.0.0.274263c08mNXKW

Plus a pair of Arona mirror glasses which I'm sure I've mentioned before somewhere and you can probably find with a search.

Only thing is that all these cost me about 250€ about a year ago and now I see that the prices are way up. So someone who's interested may have to consider some used parts from Allegro or ebay. I guess I should also mention that a scan tool like VCDS or OBD11 or VCP is mandatory.
That's a huge help, thanks very much.
How difficult was the install and do you have the coding instructions to hand?

For anyone else who has come across this, I've put the part numbers below
Bumper brackets - 5G69074555 & 5G69074556
BLIS modules - 5Q0907685B & 5Q0907686B
Mirror glass - 6F0857521 & 6F0857522
 

Stefan147

Active Member
Jan 29, 2019
193
140
Athens Greece
That's a huge help, thanks very much.
How difficult was the install and do you have the coding instructions to hand?

For anyone else who has come across this, I've put the part numbers below
Bumper brackets - 5G69074555 & 5G69074556
BLIS modules - 5Q0907685B & 5Q0907686B
Mirror glass - 6F0857521 & 6F0857522
See if that helps a bit. Coding is pretty easy for someone with some vcds know how. Trickiest part is the wiring through the doors to the mirror itself.
 

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