MG4 Adaptive Cruise seems very nervous?

[marty21]

Having used my MG4 ACC quite a bit now I’m finding its behaviour is…well…pretty nervous.
Lots of de-acceleration when changing lanes, timid on bends, and not a lot of fluidity in how it accommodates cars changing into my lane.
Any minor change in the speed of the car in front translates into quite a rapid braking….even though my inter vehicle spacing is set at the max…hmmm.
Thought maybe I could reduce this effect…possibly add some elasticity into how it was behaving….by changing the regen setting to say adaptive…but no luck here. Made no difference.
While the whole of MG Pilot could benefit from refinement, I think the ACC could especially do with real world tuning.
The Adaptive Cruise in my previous late model Toyota Corolla Hybrid was way more refined, way more forgiving.
The MG4 ACC is choppy and nervous.
Any help or thoughts here appreciated.

 

[Lillemy]

Have you had the software updated? I got an update for ACC in November 23, and the car improved greatly. Not perfect, but very usable for me at least, and yes I always use adaptive regen when using ACC as well.

 

[Jomarkh]

Hi, there are a few threads on this, check out the search bar. A lot of people turn it off

 

[decrep]

I tested mine out today, and it was horrible, tried different regen settings and car spacing, but those experiments just convinced me to keep it permanently off. Thanks be it stays off unlike LKA.
I'm fairly sure I have old firmware that doesn't benefit from better updates.

 

[benflugel]

Unfortunately even after the update, I think "nervous" is a great word for it. I liken it to a learner driver.

It's like most software on the car, well intended and cool on paper, but poorly implemented. And not updateable.

I find it desperately frustrating as the car is great fun to drive!

 

[Deleted member 11291]

Have never liked CC over the years on various cars and never use. After trying ACC on an Audi, BMW and VW did not trust any of them, even on the ‘softest’ of settings found them to be over sensitive. So again do not bother, just my take on them, each to his own.

 

[benflugel]

Be nice if there was a standard cruise control function, rather than just ACC.

 

[jenco]

I use it all of the time and find it great. To be clear, I am not referring to TJA (Traffic Jam Assist), so my ACC simply monitors the distance to the car in front, and adjusts as needed. I have had the software updated recently, but ACC seemed to work really well, for me at least right from the first miles driven, especially on motorways/dual carriageways. TJA is a different matter. I have used it several times in a proper jam, but I know that some people use it like an autopilot-style system. (One thread reported that it behaved just like their BMW 3 Series.) TJA I only use at slow speeds as the steering is too much of a leap of faith for me. When using the ACC, I tend to set the maximum speed to one fairly similar to the driving conditions at the time - that way the acceleration is not trying quite so hard to achieve its top setting, so seems a bit softer. This works for me. I have found that, since the update, increasing the ACC max-speed by 'leaning' on the left joystick on the steering wheel helps to make larger speed adjustments at 5mph increments, when conditions change. 18,000 miles in, and I'm loving it! Have you heard about the new lifetime battery and motor warranty (source: Dave Takes it On from YouTube)? That should increase the confidence levels that nervous buyers have! Feeling a bit hard-done-by with "just" a 7-year warranty now, hehehe.

 

[bedsev]

As above, I'm pretty happy with ACC. I use it round town to keep to the limits. It does slow down too much when cornering but then I just feather the throttle (can you call it a throttle without a carb or throttle body?) a bit to keep the speed up.

 

[jenco]

Yes, indeed - I tend to use the speed limit mode to keep to the limits. I sometimes even use the "intelligent" mode, although I do find that sometimes it will pick up a speed limit sign from a side road, or completely miss "my" sign if it is placed too high on the post...

 

[NLMGSAN]

I use it all of the time and find it great. To be clear, I am not referring to TJA (Traffic Jam Assist), so my ACC simply monitors the distance to the car in front, and adjusts as needed. I have had the software updated recently, but ACC seemed to work really well, for me at least right from the first miles driven, especially on motorways/dual carriageways. TJA is a different matter. I have used it several times in a proper jam, but I know that some people use it like an autopilot-style system. (One thread reported that it behaved just like their BMW 3 Series.) TJA I only use at slow speeds as the steering is too much of a leap of faith for me. When using the ACC, I tend to set the maximum speed to one fairly similar to the driving conditions at the time - that way the acceleration is not trying quite so hard to achieve its top setting, so seems a bit softer. This works for me. I have found that, since the update, increasing the ACC max-speed by 'leaning' on the left joystick on the steering wheel helps to make larger speed adjustments at 5mph increments, when conditions change. 18,000 miles in, and I'm loving it! Have you heard about the new lifetime battery and motor warranty (source: Dave Takes it On from YouTube)? That should increase the confidence levels that nervous buyers have! Feeling a bit hard-done-by with "just" a 7-year warranty now, hehehe.

We all live in Thailand....

As above, I'm pretty happy with ACC. I use it round town to keep to the limits. It does slow down too much when cornering but then I just feather the throttle (can you call it a throttle without a carb or throttle body?) a bit to keep the speed up.

There is an update for that slow down...

Having used my MG4 ACC quite a bit now I’m finding its behaviour is…well…pretty nervous.
Lots of de-acceleration when changing lanes, timid on bends, and not a lot of fluidity in how it accommodates cars changing into my lane.
Any minor change in the speed of the car in front translates into quite a rapid braking….even though my inter vehicle spacing is set at the max…hmmm.
Thought maybe I could reduce this effect…possibly add some elasticity into how it was behaving….by changing the regen setting to say adaptive…but no luck here. Made no difference.
While the whole of MG Pilot could benefit from refinement, I think the ACC could especially do with real world tuning.
The Adaptive Cruise in my previous late model Toyota Corolla Hybrid was way more refined, way more forgiving.
The MG4 ACC is choppy and nervous.
Any help or thoughts here appreciated.

De-acceleration happens if you are within set range and the system did not see you as 'in the other lane'. If it does so it still responds slowly in picking up speed..

 

[jenco]

We all live in Thailand....

Oooh, lovely place, people, and food. Now you get MG4 too! Life must be great. I hope to visit one day.... Good luck with your MG!

 

[Susanna]

Be nice if there was a standard cruise control function, rather than just ACC.

Oh how I agree with you! I have very happily used CC on many cars previously, but my ZS is the first I have had with ACC. I just don’t like it.

 

[MangoQPR]

Took my smurf out for it's first drive, after today's delivery, and now I understand about the 'nervous' quote!

Being used to cruise control in my other car, I'm used to braking at, what I consider, a sensible distance. This was a very sensible distance, and quite the deceleration!

Only first thoughts, but I think I'll pay more attention to it, over the coming weeks.

 

[NLMGSAN]

Oooh, lovely place, people, and food. Now you get MG4 too! Life must be great. I hope to visit one day.... Good luck with your MG!

That was sarcasm from my side Jenco. Suggesting it to be valid everywhere, but it only applies to Thailand.

Believe me, it will never happen around the North See....

 

[marty21]

Great news!
Much road testing later….found the solution to the ACC nervousness.
Set the car to Regen Level 1…not A not 2 not 3….and it all works beautifully.
No nervousness, no choppy acceleration deceleration.
Separation between the vehicle in front has a nice elasticity to it….quietly accelerating or de accelerating in order to maintain distance.
So set your right hand function button (has a star on it) to change regen level.
Then before heading onto the motorway each time, disable LKA for sure…then using the right hand star button toggle through to regen level 1, if it’s not your std setting.
Then when ACC is engaged it’s a great experience.
Only remaining issue with ACC (for me) is the speed reduction on bends…but understand this is resolved in later software updates…just hasn’t been released yet in Australia.
Anyways…give it a try and let me know any feedback.

 

[NLMGSAN]

Great news!
Much road testing later….found the solution to the ACC nervousness.
Set the car to Regen Level 1…not A not 2 not 3….and it all works beautifully.
No nervousness, no choppy acceleration deceleration.

ACC still reduces speed too late. Moreover, if it reduces speed the car fails to speed up in time when overtaking in adjacent lane.

 

[Matt x power]

I just wish you could switch active mode to normal cruise control, as ACC is just poor in my experience

 

[MangoQPR]

Took my smurf out for it's first drive, after today's delivery, and now I understand about the 'nervous' quote!

Being used to cruise control in my other car, I'm used to braking at, what I consider, a sensible distance. This was a very sensible distance, and quite the deceleration!

Only first thoughts, but I think I'll pay more attention to it, over the coming weeks.

So, almost 2 weeks in...

I've found using ACC to be really quite nice. Yes, it can decelerate quickly, and it doesn't pick up as quickly as I'd like, but around town, it seems to be a nice ride.

Driving along the A14, things get a little different. If someone pulls in front of me, it'll slow very quickly, but I've found that if I want to overtake, I override the system with my right boot, and then once up to speed, off the pedal and carry on.

Maybe over the coming months, it'll annoy me more, but at the mo, I'm pretty happy with it.

Just my thoughts, and I don't want to take away from anyone else's experience.

 

[NLMGSAN]

if I want to overtake, I override the system with my right boot

The reason for using ACC is to not bother using my right boot.
It only happens if you go too close to the car in front of you. Then it drops the speed,even you are in the next lane and the displays shiws the other vehicle is in an other lane. I have a video clip showing my car still drops speed from from 99 to 89 kmh. Completely useless (accelerating again cost you more than was regenerated), and dangerous for those approaching you.