SL55 AMG, SL63 AMG, SL65 AMG (R230) 2002 - 2011 (2003 US for SL55 and 2004 for the SL65)

SL55/63/65/R230 AMG: Battery control module bad

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Old 08-24-2020, 12:10 AM
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Sl55 2003
Battery control module bad

Hey guys my sl55 has battery drain and the red batt light came up. Front batt not charging well 12.85 when on and died last week, charged back with trickle charger.
I have new alt and regulator. So I removed bcm and inside it was damaged looks like a few burnt resistors. Does anyone know would this cause the front bat not to get full voltage from the alternator.
Also does anyone that can rebuild one of these ebay seems very steep on this.
One last think if there are any weekend warriors in NY that do DIY and want to take a look at the car see if they can help out PM me.
Old 08-24-2020, 07:25 PM
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1999 E300TD
Theres gotta be a beef on a wick guy in Polishtown aka Buffalo who can help. Otherwise by a new one
Old 08-24-2020, 08:54 PM
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SL 600
Be tough to rebuild it, lots of resistors and capacitors, when mine burnt, i just swapped in a used unit, i think i paid $350 at the time, which isn't bad. What prices are you seeing?
Old 10-07-2020, 03:05 AM
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2023 e450 cabriolet, 2015 s550, 2024 c300 , 2006 E55, 2005 e320, 2007 gl450, 2014 e63
Any update on this? I can’t find anything under 500

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