Question about 2004 Mercedes-Benz Mercedes Benz E Class

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My battery drains out completely if car is not used for even one day

I have new main battery & new secondary battery. Alternator also works fine. The drains our completely and car would not crank unless jump provided

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Maske sure no interior light like vanity mirror lights are staying on or left on by mistake.

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kendaknapp@aol.com

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