Description
These part numbers correspond to auxiliary batteries designed by Mercedes‑Benz for vehicles equipped with advanced electrical systems and stop‑start functionality.
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Part no A0009829608 is listed as “Auxiliary Battery 12 V 12Ah” for various Mercedes models (A‑Class, B‑Class, C‑Class, CLA, SL, CLS, E‑Class, GLA, S‑Class) on official parts sites. Mercedes Genuine Parts+2German Parts+2
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The alternate number A0009829308 is referenced as a compatible/previous version of the same auxiliary battery specification. Amazon+1
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Typical specifications observed: 12 V nominal voltage, approx 12 Ah capacity, Cold Cranking Amps (CCA) around 200A (as per listings). eBay+1
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These batteries are used as auxiliary (not main starter battery) — meaning they support the vehicle’s electronics, stop‑start system, auxiliary pump circuits, or secondary battery functions.
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Because these are OEM Mercedes units, they are built to correct form‑factor, terminal layout, mounting bracket design, and electrical parameters required by the vehicle’s auxiliary system.
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