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2001 ML320 & 2003 SL500
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405 Posts
Discussion Starter #1
Got a red battery and bring to service message. So the first thing I did was check both starter and trunk battery. The truck battery was bad. So, I replaced it and I still got the red Battery message. I checked the alternator and got a reading of 14. Which tells me the alternator is working fine.
What else can it be????
 

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Sold my 2005 SL55, 2000 CL500
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579 Posts
I think the system needs to cycle like 5 times or have it erased with SDS.
 

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Outstanding Contributor Always Remembered RIP
216 with everything. 2002 SL500 with everything. 2009 SL500 with everything.
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6,543 Posts
The car needs to go on STAR, you have the battery inverter just behind the main battery in the trunk
 
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