Battery drains overnight?

Tiny
STAN1204
  • MEMBER
  • 2004 MERCEDES BENZ S430
  • 240,000 MILES
New battery, if sits overnight the battery will drain and have to get a boost for the engine to start.
Monday, February 27th, 2023 AT 2:42 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

A drained battery overnight can be the result of several different things. For example, a short, a glove box lamp stuck on, and so on.

Here is what I need you to do. Follow the directions in this link. When I have a vehicle like this, if nothing is obvious, I use a voltmeter to test for a specific circuit drawing too much power. When you look at the link, it is one of the last things listed.

https://www.2carpros.com/articles/car-battery-dead-overnight

Let me know if this helps.

Take care,

Joe

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Monday, February 27th, 2023 AT 8:19 PM

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