Thread: Does the 2006 E350 W211 have a third battery?
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Old 11-01-2010, 01:08 PM
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ILUVMILS ILUVMILS is offline
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Quote:
Originally Posted by h769821 View Post
......so I suspect the alarm system may be wired to that battery?
The alarm siren on your car has it's own internal power supply. When you disconnect the vehicles' main battery, the siren thinks the wires have been cut, and automatically activates.
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