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2001 ML320 radio drains battery

     
Old 02-13-2018, 03:40 PM
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2001 SLK320, 2001 ML320
2001 ML320 radio drains battery
The radio drains the battery overnight unless the fuse is removed or the radio is unplugged. If the key is removed from the ignition while the radio is on, it stays on. During a long drive this weekend, the radio would spontaneously turn off while driving but could be turned back on if the power button was pressed.

Is there a specific relay sending power to this radio that might be sticky, or is this a problem with the radio?

Thanks.
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Old 02-13-2018, 09:03 PM
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2002 ML 320 & 2006 ML500
With the key out of the ign., test fuse #10. If it shows 12v, then the ign. switch is faulty.
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Jaron (02-17-2018)
Old 02-17-2018, 07:11 PM
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2001 SLK320, 2001 ML320
Fuse #10 wasn't receiving power when the key was out of the ignition, but it was blown. Replacing it seems to have fixed the issue. Thanks!
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