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-   -   Charging BOTH batteries? (https://mercedesforum.com/forum/new-mercedes-benz-forum-members-area-4/charging-both-batteries-68692/)

ronjohnstone Feb 4, 2026 05:52 PM
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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