"Battery Charge Visit Workshop" Insight Needed

OCKlasse · 02-04-2012, 01:02 AM

Hey guys,

My girlfriend's mom's 2006 S350 had this warning message appear on her dash on the way home in red. I looked at the voltage via the cluster, and the car had 12.2V before being started and then held a constant 12.0V with the vehicle running.

Is this indicative of a faulty battery? Could it be the alternator? Car has 66,000 miles on the original battery.

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MB-Dude · 02-04-2012, 08:08 AM

To me, the 12.0 volts running voltage suggests a charging problem. My cars are typically ~14 volts running. However, the battery might be drawing it down since you indicate the battery voltage is slightly *lower* with the engine running. Nevertheless, try having the battery checked first, since it's the easiest to deal with. Since it's ~6 years old, it's worth considering replacement; investigation, at least.
Cheers,
Jeff

02S430 · 02-04-2012, 10:16 PM

there is a recall on the voltage regulators that are on the back of the alternators check to see if that applies to MY 06

tusabes · 02-04-2012, 10:16 PM

most auto parts stores can test both your battery and alternator on the car for free

OCKlasse · 02-05-2012, 02:03 AM

Thanks guys. Having my buddy check it out tomorrow to see if the alternator is performing as it should. I could not find a recall for MY06 voltage regulators. Thanks.

02-04-2012, 10:16 PM	#3
02S430 MBWorld Fanatic! 2002 Mercedes-Benz S-Class Join Date: May 2006 Location: NYC/FT Lauderdale Posts: 1,914 Drives: M113 E43	there is a recall on the voltage regulators that are on the back of the alternators check to see if that applies to MY 06 __________________ SOME Modds ;) " I dont drive fast, I FLY low" "Its not that the BMW driver sucked, its just the AMG is powered by satan in mechanical form" http://www.youtube.com/watch?v=SGQEdCjc58g

02-05-2012, 02:03 AM	#5
OCKlasse MBWorld Fanatic! Garage is empty, add now Join Date: May 2006 Location: Irvine Posts: 1,335 Drives: 04 CL55	Thanks guys. Having my buddy check it out tomorrow to see if the alternator is performing as it should. I could not find a recall for MY06 voltage regulators. Thanks. __________________ 2004 CL55 - Tectite Grey / Anthracite

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02-04-2012, 08:08 AM	#2
MB-Dude Senior Member Garage is empty, add now Join Date: Aug 2005 Location: San Antonio, TX Posts: 391 Drives: '96 SL600, '05 S55 AMG	To me, the 12.0 volts running voltage suggests a charging problem. My cars are typically ~14 volts running. However, the battery might be drawing it down since you indicate the battery voltage is slightly lower with the engine running. Nevertheless, try having the battery checked first, since it's the easiest to deal with. Since it's ~6 years old, it's worth considering replacement; investigation, at least. Cheers, Jeff

02-04-2012, 10:16 PM	#4
tusabes MBWorld Fanatic! Garage is empty, add now Join Date: Jan 2008 Posts: 1,410 Drives: Mercedes	most auto parts stores can test both your battery and alternator on the car for free

02-05-2012, 02:03 AM
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