EU MG4 (all variants) - Service campaign SC077 is out, improving lane assist performance

[DixieTGS]

After SC077 I've noticed that regen level 3 doesn't seem as strong as previously. (The other things @JamesH65 mentions I got changed over a year ago via SCUK001). When "coasting" at high speed (e.g. 60 mph) I'd notice the regen go as high as 20% or more ... now it seems to only go to 17-18% as a max, until I start to press the brake pedal. Anyone else notice this?

Is it just the display that's changed (I.e. the calibration), or does it feel like you are slowing down less too?

 

[siteguru]

It feels less too - I think.

 

[JamesH65]

The other things @JamesH65 mentions I got changed over a year ago via SCUK001.

Odd, the car was in a couple of months ago for a complete software upgrade, but these things only updated when I went in for the LKA recall. I did wonder why when they thought it would take two days to update I got it back within a day!

 

[BingBong]

After SC077 I've noticed that regen level 3 doesn't seem as strong as previously. (The other things @JamesH65 mentions I got changed over a year ago via SCUK001). When "coasting" at high speed (e.g. 60 mph) I'd notice the regen go as high as 20% or more ... now it seems to only go to 17-18% as a max, until I start to press the brake pedal. Anyone else notice this?

Yes. Idk if its SC077 because my car didn't get official SC associated with the VIN. But absolutely less regan without pressing the brakes

 

[DixieTGS]

It feels less too - I think.

I had a feeling they might go that route to reduce the effect of the unexpected reversing up hill problem with OPD. If that is the case, it's doubly annoying for you and others who don't even get the option of OPD. More likely I think, it's a way of reducing how quickly it slows under ACC.

 

[siteguru]

You may be right. As it happens I've already adapted to the change.

 

[NLMGSAN]

I had a feeling they might go that route to reduce the effect of the unexpected reversing up hill problem with OPD. If that is the case, it's doubly annoying for you and others who don't even get the option of OPD. More likely I think, it's a way of reducing how quickly it slows under ACC.

I do not experience any change with OPD.

 

[nanomad]

After SC077 I've noticed that regen level 3 doesn't seem as strong as previously. (The other things @JamesH65 mentions I got changed over a year ago via SCUK001). When "coasting" at high speed (e.g. 60 mph) I'd notice the regen go as high as 20% or more ... now it seems to only go to 17-18% as a max, until I start to press the brake pedal. Anyone else notice this?

I had that after an update last September. IIRC it was linked to BCM update

 

[siteguru]

I had updates at my 2nd service in November (which included 1100R38 and HVAC) but there was no change to regen then. (My dealer would have applied any outstanding updates - they always do). So I can only presume that this change was related to SC077.

 

[ReintjeWA]

I paid some attention to it today but my Aus spec trophy (64 bat) also regens to a max of 18% on regen setting 3. We don't have SC077, but then again I believe most Aussie spec cars came with a better LKA anyway, as most of us don't seem to report the issues we saw being reported from the UK and Europe.

 

[WonkoTheSaneUK]

I paid some attention to it today but my Aus spec trophy (64 bat) also regens to a max of 18% on regen setting 3. We don't have SC077, but then again I believe most Aussie spec cars came with a better LKA anyway, as most of us don't seem to report the issues we saw being reported from the UK and Europe.

Australia never got the "Phase 1" MG4 that came without a rear wiper or centre headrest.

 

[the happy bunny]

I also find that the car feels noticeably smoother with SC077.

As I usually drive in one-pedal mode, I didn’t notice any change in the regenerative braking levels. However, the car is easier to control at low speeds, particularly when stopping and pulling off uphill.

From what I understand, the IMCU (Intelligent Motor Control Unit) only operates in Drive. My driveway is quite steep, and the car behaves completely differently depending on whether I park forwards or backwards. When I park backwards, it’s particularly harsh, even brutal!

 

[siteguru]

I also find that the car feels noticeably smoother with SC077.

As I usually drive in one-pedal mode, I didn’t notice any change in the regenerative braking levels. However, the car is easier to control at low speeds, particularly when stopping and pulling off uphill.

From what I understand, the IMCU (Intelligent Motor Control Unit) only operates in Drive. My driveway is quite steep, and the car behaves completely differently depending on whether I park forwards or backwards. When I park backwards, it’s particularly harsh, even brutal!

What do you mean by this? You reverse up the hill to park then drive down? Or you drive up the hill and reverse down? In what way is it brutal?

I reverse park onto my drive, which is fairly steep, and have no problems at all*. When pulling away I put the car in D, keep my foot on the brake then manually release the parking brake by pressing the lever next to the rotary dial, then feather off the brake.

* the Corsa manual ICE courtesy car I had recently really struggled to reverse up my drive. That may have partly been me, and partly the fact that the clutch bite point was really high - almost like an On/Off clutch.

 

[the happy bunny]

What do you mean by this? You reverse up the hill to park then drive down? Or you drive up the hill and reverse down? In what way is it brutal?

I reverse park onto my drive, which is fairly steep, and have no problems at all*. When pulling away I put the car in D, keep my foot on the brake then manually release the parking brake by pressing the lever next to the rotary dial, then feather off the brake.

* the Corsa manual ICE courtesy car I had recently really struggled to reverse up my drive. That may have partly been me, and partly the fact that the clutch bite point was really high - almost like an On/Off clutch.

When driving uphill: the car starts and stops more smoothly than it did before I applied SC077.

When reversing uphill: the car slips on gravel and jerks out of a stop.

When driving downhill: the car remains smooth and easy to control.

When reversing downhill: it sort of bangs into gear, but it jerks less than when reversing uphill, as I can easily control it with the brakes.

• My TM3 (also RWD) has no issues driving or reversing uphill on the very same driveway.
• When I set One-Pedal mode, the car still surges when in reverse.
• Last month, after an issue updating the FVCM, I drove the car with several modules bricked and experienced the same behaviour in drive as I usually do in reverse.
• When I read the X-Power specs, I discovered that there’s no AWD in reverse either.

All of this makes me think they simply didn’t bother implementing traction control for reversing!

 

[BingBong]

When driving uphill: the car starts and stops more smoothly than it did before I applied SC077.

When reversing uphill: the car slips on gravel and jerks out of a stop.

When driving downhill: the car remains smooth and easy to control.

When reversing downhill: it sort of bangs into gear, but it jerks less than when reversing uphill, as I can easily control it with the brakes.

• My TM3 (also RWD) has no issues driving or reversing uphill on the very same driveway.
• When I set One-Pedal mode, the car still surges when in reverse.
• Last month, after an issue updating the FVCM, I drove the car with several modules bricked and experienced the same behaviour in drive as I usually do in reverse.
• When I read the X-Power specs, I discovered that there’s no AWD in reverse either.

All of this makes me think they simply didn’t bother implementing traction control for reversing!

You absolutely right. There is no TRC for reverse. I checked at close road, and the initial start at reverse is stronger then at drive, there is a lot of wheels spin

 

[siteguru]

Thanks. I have a paved drive so no traction issues.

 

[GJMG4 North]

Took my TLR in for its first service today, unfortunately no software update were applied during that process, I specifically asked before paying whether SC077 had been applied and was met with blank stares and then a bit of scrabbling on the laptop. It's now booked in for an update in 2 weeks time. It's concerning that customers are keeping dealers up to date and not the other way around. Since without this forum as a resource I'd have no idea what was what, how do I check what else needs updating in order to be prepared for my next visit?

 

[Edd Beesley]

Thanks. I have a paved drive so no traction issues.

You're not trying hard enough

 

[siteguru]

If I try any harder I'll hit the dog.

Post in thread 'XPower (only) colour POLL'

Mar 4, 2025

That must be an X-Power thing then ... my 2022 SE SR has moulded plastic.

(Photo includes complimentary dog)

• siteguru

 

[NLMGSAN]

It is getting even more weird now.... Yesterday they fixed the wheel bearing, and they also claimed to have updated ACC because it suddenly stops working during a drive.

Now, OPD does not exceed 20% anymore.... and ACC still suddenly stops (although I think that is related to AEB).

So yes, the value is lower now. But strangly enough I do not feel like it reduces speed less then before. I still lift at the same distance from the traffic lights as before.