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In a 2014 Mercedes C250, you'll find the auxiliary battery situated beneath the cabin air filter housing, which is positioned to the left of the engine bay. The primary role of this Mercedes-Benz auxiliary battery is to supply power to the "stop-start" feature and support the operation of your car's accessories. If your vehicle has been starting normally but you are repeatedly seeing a red warning symbol on your instrument cluster indicating an issue with the battery, it may be time to replace the 12-volt auxiliary battery. You have the option to choose the original Mercedes-Benz auxiliary battery or consider a more affordable alternative that meets the required specifications.
In my 2014 Mercedes C250, you can find it in the passenger foot area. Simply lift the carpet to reveal it placed on top of the diagonal fuse box.
The 2014 Mercedes C250 has its auxiliary battery located atop the passenger-side footwell. To reach it, you'll need to take out the plastic molding and carpet in that section.
Can you tell me the location of the battery?