2003 Mercedes Benz E500 dead Battery

2003 MERCEDES BENZ E500
5.0L • V8 • AUTOMATIC
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MELVIN1032
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I am trying to open my trunk and my battery is dead
Apr 2, 2014 at 3:48 PM
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KNOWLEDGE IS POWER
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These cars have an auxiliary battery under the hood, near the firewall. Pop the hood and attach a 12v power supply to the aux battery relay and it will power the accessories enough to get the trunk open

See the diagrams below for location
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Apr 2, 2014 at 3:57 PM