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Has the 48v battery issue been resolved with the E450?

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Old Jun 11, 2025 | 04:42 PM
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Question Has the 48v battery issue been resolved with the E450?

Hi, all!

I'm really considering pulling the trigger on a 2022 E450 with about 12K miles. It was manufactured in 02/22. I've been doing my due diligence and have been reading a lot about the M256 reliability. The 48v battery seems to be an issue (although not sure how common and if it's still ongoing). The vehicle's in great shape - it's been taken in for all the recalls/services.

In the VMI, it states:
  • Campaign No. 2024030001 Check 48V Ground Connection
  • Campaign No. 2023070012 Fuel Pump
  • Campaign No. 2022100009 Install 12V Battery Support
What are your guys' thoughts?
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Old Jun 11, 2025 | 05:08 PM
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W214 E450
What 48v issues have you heard about? If there are legit issues I would think 2022 would be a year with them since it was only the second year with the 48v mild-hybrid in the E-Class. The fact that its a 2022 and no apparent issues at least tells you that its still working in that car. There are three more model years of the E-class with the M256 mild-hybrid 48v system since thw 2022, so I would expect most of the issues to have been worked out by now. Not that thise three additional years would benefit a 2022 model though.
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Old Jun 11, 2025 | 06:53 PM
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2023 E 450 Sedan. 2018 GLC 300. 2013 E 350 Coupe (retired)
2023 E 450. Manufactured 10/22. No issue. Great car. Can only see if 48V battery is momentarily charging or discharging, cannot figure out overall state of charge.
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Old Jun 11, 2025 | 07:02 PM
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Originally Posted by smiles201
2023 E 450. Manufactured 10/22. No issue. Great car. Can only see if 48V battery is momentarily charging or discharging, cannot figure out overall state of charge.
How many miles?

Last edited by BerkTownKid; Jun 11, 2025 at 07:06 PM.
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Old Jun 11, 2025 | 09:34 PM
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They are mostly solved, I haven't heard an issue reported on the forums that has to do with the 48v mild hybrid system battery on more recent model year MBs.
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Old Jun 11, 2025 | 11:29 PM
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Originally Posted by W205C43PFL
They are mostly solved, I haven't heard an issue reported on the forums that has to do with the 48v mild hybrid system battery on more recent model year MBs.
How recent are the models you're talking about? 22-23?
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Old Jun 12, 2025 | 05:41 AM
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Originally Posted by BerkTownKid
How recent are the models you're talking about? 22-23?
Seems like most 2023 and 2024 beyond have it resolved.
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Old Jun 12, 2025 | 06:33 AM
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I have a 22 E450 All-Terrain with 50K miles on it. No issues at all.
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Old Jun 12, 2025 | 09:28 AM
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2019 E53 with 117k miles and zero 48v issues.
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Old Jun 12, 2025 | 08:21 PM
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Originally Posted by lkfoster
2019 E53 with 117k miles and zero 48v issues.
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Old Jun 12, 2025 | 09:25 PM
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My E53 2022 is working good and no problems with the 48v so far. I have all my recalled done already including the wire from the transmission.
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Old Jun 13, 2025 | 03:33 PM
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Originally Posted by Cosworth2000
My E53 2022 is working good and no problems with the 48v so far. I have all my recalled done already including the wire from the transmission.
That is always good to hear please continue to enjoy it.
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