Over the top ML350 battery replacement cost




There are two batteries:
Main battery, under front passenger seat.
Auxiliary battery, inside the trunk, passenger side.
I just replaced the main battery. Doable, but pain in the butt because there is very limited space to work with.
To replace the aux battery, you have to essentially tear down the entire trunk of the car. I would have this done at the dealer or a good mechanic.
Make sure to keep the car under power with a secondary host battery during replacement. Otherwise you may lose your car settings.
Last edited by Matt-Dallas; May 27, 2019 at 08:56 PM.




Last edited by CSM; May 31, 2019 at 05:00 PM.




I'm guessing from the lack of mention of any coding (a la BMW), it's simply swap'n go?




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I purchased it used in January, 2016 and it was originally placed in service in April, 2011.
I hope the new battery lasts as long as the original!
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