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; located in trunk or under trunk floor; do not substitute with standard lead acid
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BCI Group AUX-S
agmAuxiliary🛒 Cross-references (buy at any parts store)
Fitment notes: OEM size: 12V 12Ah AGM auxiliary/backup battery (Mercedes-Benz AUX type, e.g. A000982xxxx) · Location: Engine compartment, right side near the firewall/cowl on most builds; some variants locate it under the rear seat or in a trunk side well · Purpose: Voltage support / backup power for safety and comfort electrical consumers during start-stop and 48V mild-hybrid (ISG) restarts, keeping the 12V network stable when the main battery voltage dips
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases —
how we link. This never changes the specs we publish.