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Currently have a MB EQS that’s fantastic for about 1/3 of what it cost new.
I have a 2020 GLB250 and mine was saying "12V battery" on and off for a few weeks. I checked under the hood with a multimeter and my main battery did have a low voltage while the car was off. I replaced it a few weeks back. No more notification.
I had the same issue on my w213 - same warning every now and then until one day it just didn’t start. Replaced the battery and solved the issue.
I called roadside and got it installed for 100 dollars 3 months ago.
m.b. buy a Benz battery?
If the battery dropped to 9V it is probably defective.
That happened to me when the battery was dying. The Honda OEM batteries suck.
I did have to buy a new battery because the OEM was leaking, but other than that, the vehicle has been great.
In the 166 body MB ML/GL, its under the passenger seat, with barely enough room to reach the rear terminal. It's also so far forward that you can barely grab the fuckin thing. Oh, did I mention that it is a group 49 battery.
I replaced the battery on my wives 2009 honda accord. Started her up and it made this awful sound the second the AC kicked on. Bogged down the engine and made it run rough. It has never had AC issues until now and I'm sure it's coincidence with the battery changeout.
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In March 2026 on PartReview, battery OEM Honda were overall better than OEM Mercedes.
In March 2026 on PartReview, battery OEM Honda were overall more popular than OEM Mercedes.
By vote balance, battery OEM Honda surpassed OEM Mercedes:
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You can also see who is better among other battery manufacturers: OPTIMA or Varta, OPTIMA or Bosch, OPTIMA or OEM Subaru, OPTIMA or OEM Volkswagen, OPTIMA or YUASA.