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Car Batteries
Mercedes-Benz 300-Series

What would cause battery drain in a 1981 Mercedes Benz 380sl?

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Wiki User
June 06, 2009 10:00PM

You have a short somewhere. If you've installed a newer CD or radio to a perpetually "hot" wire (like I did, once), then it's probably your culprit. In that case, find the original radio hot wire and hook it back to that. Otherwise, it's a time consuming task of isolating different areas of your electrical system.