that is pretty low CCA, thats the original battery??? . Even the battery in an old W124 E320 has higher CCA, Your model car needs an H8 battery which is between 700-950 CCA and has an RC of 100 amps.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)