The auxiliary battery on the 2012 Mercedes cls550 is located in the trunk. The main function of the Mercedes-Benz auxiliary battery is to provide voltage to the "stop-start" function. The auxiliary battery is also used to help run the accessories of Your car. If Your car has been starting fine but You keep on getting the red warning on Your instrument cluster that shows You a symbol of the battery then Your auxiliary 12-volt battery may need to be replaced. You can go with the OEM Mercedes-Benz Auxiliary battery or You could go with a more cost-effective alternative that meets the specifications.
Regina H
July 16, 2020
The auxiliary battery can be found below the dash cluster behind the hush//trim panel in the 2012 mercedes cls550.
Reginald
October 6, 2022
2012 cls550 Aux battery located
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