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I'm looking for general guidance for replacing my old battery with new one. on 2008 Mercedes-Benz E320 BLUETEC

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Which terminal, positive or negative, do I connect first? In this model what, if anything, do I also need to do for getting electronics back in sync (e.g. digital clock,power windows,sunroof, auto seat location)?
(1) Answer
Connect negative terminal first. Resetting your personal settings on the electronics should be available in the owners manual.