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Charging BOTH batteries?

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Old Feb 4, 2026 | 05:52 PM
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ronjohnstone's Avatar
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Default Charging BOTH batteries?

Is it possible to charge both batteries in my 2007 SL550 by an under the hood hookup of a battery charger? Just hooking up a charger to the starter battery only seems to charge the starter battery. You would think MBZ would have come up with a way to charge both in sequence.
 
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