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engine noise

  1. Electrical help, subwoofer

    Car Audio/Alarms/UConnect/Navigation
    I have a 2005 300c. I just installed a new cd player and now trying to add a subwoofer in the trunk. All the wires are hooked up correctly. The ground from the amp is connected to the same ground as the battery. It seemed to work fine when I first installed it but quickly turned out making...
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