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W222 AMG S65 lithium battery change instructions

Old Jun 28, 2023 | 09:38 AM
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2015 S65 AMG
W222 AMG S65 lithium battery change instructions

Does anyone know the procedure to change out a lithium battery on a 2015 S65 AMG? It’s a special battery with a lot of connectors. I’ve changed out a lot of batteries in my life but this one is much different and I’m sure there has to be a process order to disconnect it and install the new one.
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Old Jun 28, 2023 | 11:04 AM
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First you have to find the new battery. If you already have the battery there is no special order to unplugging everything. I would start with the positive terminal, then negative, then the connectors. Benz Ninja has a service where he can program the car not to look for this Li Ion battery and then you can just use a comparable AGM battery for a fraction of the cost of a new Li Ion battery. The only reason MB used a Li Ion battery on the S65/63 variants is for weight savings.
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Old Jun 28, 2023 | 11:12 AM
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Great to know! Thank you!!
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Old Jun 28, 2023 | 07:00 PM
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Originally Posted by superpop
First you have to find the new battery. If you already have the battery there is no special order to unplugging everything. I would start with the positive terminal, then negative, then the connectors. Benz Ninja has a service where he can program the car not to look for this Li Ion battery and then you can just use a comparable AGM battery for a fraction of the cost of a new Li Ion battery. The only reason MB used a Li Ion battery on the S65/63 variants is for weight savings.
Does one type last longer than the other though?
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Old Jun 28, 2023 | 07:07 PM
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@w205, the benz lithium is said to last up to 10 years or so, in my experience AGMs can go 7+.

Problem is right now sourcing the lithium car battery for the S63/65 and GTs are almost impossible since it’s back ordered with no fulfillment time frame (gray market new old stock is grossly inflated). Fortunately for us, benzninja can code in/out the use of an AGM if and when your lithium decides to throw in the towel.
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Old Jun 28, 2023 | 07:21 PM
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Originally Posted by vincheung
@w205, the benz lithium is said to last up to 10 years or so, in my experience AGMs can go 7+.

Problem is right now sourcing the lithium car battery for the S63/65 and GTs are almost impossible since it’s back ordered with no fulfillment time frame (gray market new old stock is grossly inflated). Fortunately for us, benzninja can code in/out the use of an AGM if and when your lithium decides to throw in the towel.
I see, understood.
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Old Jun 28, 2023 | 11:41 PM
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It's important to disconnect the negative side of the battery first, otherwise you can cause an electrical short if the positive is removed first. Positive first when reinstalling the cables.

Last edited by Jud Chapin; Jun 29, 2023 at 09:32 AM.
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Old Jun 30, 2023 | 12:38 AM
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Originally Posted by vincheung
@w205, the benz lithium is said to last up to 10 years or so, in my experience AGMs can go 7+.

Problem is right now sourcing the lithium car battery for the S63/65 and GTs are almost impossible since it’s back ordered with no fulfillment time frame (gray market new old stock is grossly inflated). Fortunately for us, benzninja can code in/out the use of an AGM if and when your lithium decides to throw in the towel.
2014, I'm on 9 Years.... No Issues. I keep it on a charger during the Winter Months or when not driving for extended periods... Had to replace the AUX battery once.
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Old Jun 30, 2023 | 04:09 AM
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Originally Posted by Nice Ride
2014, I'm on 9 Years.... No Issues. I keep it on a charger during the Winter Months or when not driving for extended periods... Had to replace the AUX battery once.
no issues, keep your battery, you can always do it later. no hurry
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