If You want to know where the auxiliary battery is located on the 2019 Mercedes Benz S550, it is located behind the right side of the trunk carpet. You'll find it located right next to the fuses to the very bottom right. The main function of the auxiliary battery on the Mercedes S550 is to provide power or voltage to the stop start so that it can function without any issues. What it also does is it helps keep the electrical functions on such as the GPS, lane assist, and many others.
Mark R
July 16, 2020
The 2017 mercedes s550 auxiliary battery is located behind the passenger side panel of the trunk.
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