The auxiliary battery can be found in the 2015 Mercedes ML350s cargo area. To access it, simply pop open the panel in the cargo area to reveal the auxiliary battery. It is usually covered by a small panel that opens when You pull on its handle. The auxiliary battery is used to power secondary accessories that are housed within the car. The primary battery, which is found under the hood, is used to power the car directly. As a result, an auxiliary battery failure may result in some accessories, such as Audio systems or lights not working properly. In Mercedes vehicles, auxiliary batteries usually last for up to 3 years.
Joseph W
July 16, 2020
The 2015 mercedes ml350 auxiliary battery is located under the floor in the cargo area.
John C
February 26, 2022
I find a battery, 850 CCA under the passenger seat. It appears to be the main battery. I do not see an auxiliary battery anywhere, including under the cargo area where spare tire is located. I am getting auxiliary battery malfunction message. 2015 ML 350
John c
February 25, 2022
Dont see it.
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