e-Drive Unit/ Power Electronics Control Unit Software Update
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EQB 300
e-Drive Unit/ Power Electronics Control Unit Software Update
Just got intimated by my dealer that there is a software update from Mercedes Benz that is apparently supposed to improve the "robustness" of the drive unit, battery management system, and DC charging. Vehicle has to be brought in to the dealership for this update. Not user serviceable at all. All EQB models (250, 300, 350) seem to be affected/ getting the update.
Anyone got the update done? Does it bring any noticeable improvement to the driving range or acceleration?
I have not experienced any issues with my car so far (touch wood) and would hate to go to the dealership and waste half a day (maybe more?). IME with other cars, they always manage to break something that was previously working fine (lol).
Anyone got the update done? Does it bring any noticeable improvement to the driving range or acceleration?
I have not experienced any issues with my car so far (touch wood) and would hate to go to the dealership and waste half a day (maybe more?). IME with other cars, they always manage to break something that was previously working fine (lol).
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From: USA - Minnesota
2014 GL350
Just got intimated by my dealer that there is a software update from Mercedes Benz that is apparently supposed to improve the "robustness" of the drive unit, battery management system, and DC charging. Vehicle has to be brought in to the dealership for this update. Not user serviceable at all. All EQB models (250, 300, 350) seem to be affected/ getting the update.
Anyone got the update done? Does it bring any noticeable improvement to the driving range or acceleration?
I have not experienced any issues with my car so far (touch wood) and would hate to go to the dealership and waste half a day (maybe more?). IME with other cars, they always manage to break something that was previously working fine (lol).
Anyone got the update done? Does it bring any noticeable improvement to the driving range or acceleration?
I have not experienced any issues with my car so far (touch wood) and would hate to go to the dealership and waste half a day (maybe more?). IME with other cars, they always manage to break something that was previously working fine (lol).
Our EQB is already scheduled for its first scheduled free service (USA) in early December and since I’ll have a loaner I’ll ask them to check this while it’s there.
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EQB 300
Look forward to that. I might be bringing mine to the dealership in early December for the update. As of now, the dealer is still awaiting further information from MB and shall schedule the appointment when they know for sure what exactly needs to be done.
Last edited by EQBFan; Nov 27, 2023 at 08:54 AM.
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From: Teaneck, NJ
2023 EQB300
Dealer performed the update and service advisor said he had no idea what it really is supposed to do. But my car came up on the system requiring it, so just did it. Will report if I actually notice any difference.
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From: Teaneck, NJ
2023 EQB300
Only about a half hour to download update. I was there forever because they had to download map update which would not update over the air. And I had an error code with collision warning sensors that required recalibration. And then another trip back because apparently their carwash bent license plate and frame. Their fault for not doing a walk-around when returning vehicle and my fault for not doing my own walkaround. But they fixed it with apologies so can't ask for anything more than that.
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EQB 300
Just got mine updated. Apparently, the software update is an hours job but dealer wanted to keep the car overnight to test sleep mode, charging. acceleration, etc. Did not notice any difference post update during my short drive home from the dealership. Shall see if there is any difference in driving feel or efficiency when I drive to work tomorrow.
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EQB 300
ok, just completed a longish drive. Absolutely no difference in the drive experience or efficiency. Was hoping they will improve something meaningful with this update. Not really sure what the update was all about.
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From: Teaneck, NJ
2023 EQB300
I recall that the dealer bulletin said something to the effect of "robustness of DC charging", I'll see if DC charging is affected the next time I find an EA station either that works or isn't in use. Of course, also my scientific and statistical background also tells me that the state of the theoretically working and available EA charger is another unquantifiable factor.
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From: USA - Minnesota
2014 GL350
FWIW, our EQB is absolutely driving differently since it was in the shop and the difference is a noticeable improvement. However, I don’t know if this is the result of this specific update, or if there was other phantom work or calibration resets performed at the same time.
Basically, there is a significant difference when the car’s motors transition from power to re-gen, and then from re-gen to braking. Now the car is extremely smooth when you lift off the ‘gas’ and the car transitions to re-gen. The amount of re-gen is not changed, but the transition itself is now very smooth whereas previously it was usually smooth, but not always. Ditto for the blending of re-gen with physical brakes. Previously the car could be inconsistent in the behavior but now it’s all very consistently smooth, with consistent behavior.
These are minor, but welcome improvements. I’m gonna suspect this software package simply brings the earlier EQBs into alignment with the ‘refresh” 2024 model since the drivetrain hardware itself appears similar, if not identical.
We never DC charge so I can’t share any observations with DC charging.
Last edited by cadetdrivr; Dec 21, 2023 at 05:41 PM.
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EQB 300
Thank you for sharing your observations. My experience has been a little different.
I have not noticed any significant difference. What is your month/ year of manufacture? Mine is a Nov 22 car so I am guessing the car likely came with a better regen calibration or my dealer has not applied the update.
I am on a longish road trip so I am using the friction brakes for slowing down more often than I typically due in my regular driving (where I am mostly able to anticipate the traffic ahead). I can clearly say that when you need to slow down quickly due to stopped/ slow traffic ahead and you push them firmly, sometimes there is an abrupt slowdown when they grip and then as you release the brake pressure gradually, they let go and you can feel the car start to seemingly 'accelerate'/ 'freewheel'. So that is quite inconsistent and something that I have to be always careful about.
I have not had any issues pre/post charging so I also am also not able to comment.
Yes, I would have liked to see those in my car as well. I am guessing I did not get the 'full suite' of updates. Is there an easy way to figure out what patches have been applied, from within MBUX or the dashboard?
BTW, here is what my work order shows wrt to the update:
Job code: 02-9334-01
Description: Update power electronics control unit software at front axle (SG-LE-VA) (with XENTRY Diagnostics connected)
SAC code: 998714
It would be very helpful if you could list the jobs/ updates that were done when you sent yours for the update. I can compare with mine and take it up with the dealership.
Basically, there is a significant difference when the car’s motors transition from power to re-gen, and then from re-gen to braking. Now the car is extremely smooth when you lift off the ‘gas’ and the car transitions to re-gen. The amount of re-gen is not changed, but the transition itself is now very smooth whereas previously it was usually smooth, but not always.
Yes, I would have liked to see those in my car as well. I am guessing I did not get the 'full suite' of updates. Is there an easy way to figure out what patches have been applied, from within MBUX or the dashboard?
BTW, here is what my work order shows wrt to the update:
Job code: 02-9334-01
Description: Update power electronics control unit software at front axle (SG-LE-VA) (with XENTRY Diagnostics connected)
SAC code: 998714
It would be very helpful if you could list the jobs/ updates that were done when you sent yours for the update. I can compare with mine and take it up with the dealership.
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2014 GL350
I'm also wondering if there was some sort of a calibration performed after the update on my car which could account for a difference but is not delineated on the receipt?
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EQB 300
Thanks for sharing. Looks pretty similar to mine.
After you pointed out that the friction brakes now feel smoother, I started paying attention to how the car has been braking. I feelI am able to bring the car to a complete stop more smoothly now. Previously, there was always a jerk in how the car would stop because the motor would maintain power until the last minute before cutting off. Now the motors seem to modulate the power levels a little better and the car does not give as big a jerk when coming to a stop. I was attributing this to my driving skills/ familiarity with the car so far (lol), but you are right, it could be due to the eDrive software update. Shall monitor it for a few days before confirming. Not so sure about the high speed braking - have another long highway drive coming tomorrow. Shall post observations post that.
After you pointed out that the friction brakes now feel smoother, I started paying attention to how the car has been braking. I feelI am able to bring the car to a complete stop more smoothly now. Previously, there was always a jerk in how the car would stop because the motor would maintain power until the last minute before cutting off. Now the motors seem to modulate the power levels a little better and the car does not give as big a jerk when coming to a stop. I was attributing this to my driving skills/ familiarity with the car so far (lol), but you are right, it could be due to the eDrive software update. Shall monitor it for a few days before confirming. Not so sure about the high speed braking - have another long highway drive coming tomorrow. Shall post observations post that.
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From: USA - Minnesota
2014 GL350
Thanks for sharing. Looks pretty similar to mine.
After you pointed out that the friction brakes now feel smoother, I started paying attention to how the car has been braking. I feelI am able to bring the car to a complete stop more smoothly now. Previously, there was always a jerk in how the car would stop because the motor would maintain power until the last minute before cutting off. Now the motors seem to modulate the power levels a little better and the car does not give as big a jerk when coming to a stop. I was attributing this to my driving skills/ familiarity with the car so far (lol), but you are right, it could be due to the eDrive software update. Shall monitor it for a few days before confirming. Not so sure about the high speed braking - have another long highway drive coming tomorrow. Shall post observations post that.
After you pointed out that the friction brakes now feel smoother, I started paying attention to how the car has been braking. I feelI am able to bring the car to a complete stop more smoothly now. Previously, there was always a jerk in how the car would stop because the motor would maintain power until the last minute before cutting off. Now the motors seem to modulate the power levels a little better and the car does not give as big a jerk when coming to a stop. I was attributing this to my driving skills/ familiarity with the car so far (lol), but you are right, it could be due to the eDrive software update. Shall monitor it for a few days before confirming. Not so sure about the high speed braking - have another long highway drive coming tomorrow. Shall post observations post that.
But to reiterate, I’m perceiving a smoother transition at higher speeds between the traction motors creating power and the switch to re-gen, and again at very low speeds when the friction brakes are blended in. It’s all just smoother and I have not been able to get any jerks or inconsistent behavior which is something that would happen occasionally before.
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EQB 300
So that is an area where I feel they need to improve things a bit more because the friction brakes do feel a bit grabby when they are engaged leading to a sudden deceleration and then when they let go, the car seems to feel as if it suddenly picked up speed. Anyway, I shall keep monitoring and share my observations.
