What Battery Matches A Mercedes-Benz A4?

For Mercedes-Benz vehicles commonly referred to in aftermarket contexts as “A4” models (typically older C-Class or A-Class variants), compatible batteries include 12V AGM or lead-acid batteries with capacities ranging 80–95Ah. Key examples include:

Car Starter LiFePO4 Batteries

Voltage & chemistry: 12V systems dominate, with AGM (Absorbent Glass Mat) batteries preferred for models equipped with start-stop technology. Lead-acid alternatives suit non-AGM applications. Capacity requirements: 80Ah units (e.g., H6 size) fit compact models like A-Class, while 95Ah (H7 size) supports larger engines in C/E-Class.

What specifications define Mercedes-Benz A4-compatible batteries?

Mercedes-Benz A4-compatible batteries require 12V output, 800–950 CCA, and AGM technology for start-stop systems. Terminal configuration (Euro/DIN) must match OEM layouts to prevent connection issues.

AGM batteries like the 80Ah H6 provide 800–850 cold cranking amps (CCA), sufficient for gasoline engines up to 2.0L. For diesel variants or cold climates, 95Ah batteries with 900+ CCA are mandatory. Pro Tip: Always verify the battery management system (BMS) compatibility—modern Mercedes require reset procedures when replacing batteries. For example, a 2020 A220 demands AGM H6 battery with software recalibration post-installation to prevent charging errors.

How do AGM and lead-acid batteries differ for Mercedes applications?

AGM batteries offer 3× cycle life and vibration resistance vs. standard lead-acid units. While both provide 12V output, AGM handles start-stop systems’ frequent discharges without sulfation damage.

Lead-acid batteries average 300–500 cycles, whereas AGM achieves 1,200+ cycles at 50% depth of discharge. Their sealed design prevents acid leaks, critical for Mercedes’ common under-seat battery locations. However, AGM costs 40–60% more upfront. Pro Tip: For non-start-stop Mercedes models (pre-2010), conventional lead-acid remains cost-effective. Table 1 compares technical specs:

Redway Power Expert Insight

12V 90Ah LiFePO4 Car Starting Battery (CCA 1300A)

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