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strange dead batteries

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Old Apr 2, 2020 | 05:08 PM
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Will Hunt's Avatar
Will Hunt
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From: indiana
2008 s550
strange dead batteries
I have a 08 s550 I have gone through 6 batteries 5 autozone 1 walmart within 24 hours they will drain to 5 volts it only draws 170 millivolts when off and locked I have tried to pull fuses and unplug the seat module none made a difference in amp draw I got no fault codes can't figure it out.
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Old Apr 2, 2020 | 11:33 PM
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2012 S350 Bluetec 4MATIC; 2011 ML350; 2005 C230k;
Which battery is giving you trouble? Starter battery in engine compartment or main battery in trunk?
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Old Apr 3, 2020 | 03:14 PM
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2008 s550
the consumer battery in the trunk
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Old Apr 4, 2020 | 08:14 AM
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2004 W240 Maybach 57
Originally Posted by Will Hunt
the consumer battery in the trunk
Check and re-check all battery terminal connections. Clean corrosion off all connections. Make sure the negative ground cables are securely fastened to the chassis for both batteries. There might be a sequence of disconnecting battery terminals--in mine it is 1) negative terminal consumer battery, 2) negative terminal starter battery, 3) either positive terminal can then be disconnected next...Re-attach in the reverse order: fit the positives back, then the negative starter battery and finally, the negative consumer battery. Read it in your manual.
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Old Apr 11, 2020 | 01:07 AM
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W221 S600, W220 S55 AMG Kompressor, W124 300E, W140 S320, W210 E3204M W164 ML320 Bluetec
Originally Posted by Will Hunt
the consumer battery in the trunk
When you disconnect the consumer battery, do you disconnect remove the bolt securing the ground cable to the chassis, or remove the terminal directly from the battery? Do you see excessive arcing when you reconnect the terminal?
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Old Apr 12, 2020 | 12:00 AM
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From: indiana
2008 s550
Originally Posted by Polar Bear
When you disconnect the consumer battery, do you disconnect remove the bolt securing the ground cable to the chassis, or remove the terminal directly from the battery? Do you see excessive arcing when you reconnect the terminal?
I remove it from the battery terminal and I do notice arcing sometimes.
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Old Apr 12, 2020 | 12:13 AM
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I put a 18ah jumper box on it for 19 hours and it still held charge.
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Old Apr 24, 2020 | 08:50 PM
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I left a multi meter on for an hour and it fluctuates between 10-120 milivolts.
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Old May 17, 2020 | 08:22 PM
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Solved the tel-aid module went bad.
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Old May 18, 2020 | 04:30 AM
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Old May 22, 2020 | 09:16 PM
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2008 s550
Originally Posted by pmercury
Is this a free repair?
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