850 CCA
Cold Cranking Amps
TerminalTop Post
PolarityRight Positive
Dimensions13.94" × 6.88" × 7.5"
🛒 Cross-references (buy at any parts store)
Fitment notes: AGM battery required for start-stop system; located in trunk
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BCI Group AUX-S
agmAuxiliary high200 CCA
Cold Cranking Amps
🛒 Cross-references (buy at any parts store)
Fitment notes: OEM size: 12V 12Ah AGM (Mercedes A000 982 96 08 / similar backup battery) · Location: engine bay, passenger (right) side near firewall/cowl under a cover — on some W213 builds under the front passenger footwell trim; main battery sits in the trunk floor well · Purpose: voltage support during ECO start-stop restarts and backup for critical electronics
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases —
how we link. This never changes the specs we publish.