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 or under rear seat depending on configuration
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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 aux type, e.g. A000 982 xx xx; equivalent to AUX14L-class) · Location: Engine compartment, typically near the firewall/left side (the main AGM starter battery is mounted in the trunk/rear on the W214 platform) · Purpose: Voltage stabilization and backup power for the electrical system \u2014 supports voltage during ECO start-stop/ISG (integrated starter-generator) restarts and maintains supply to safety-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.