Question about 2001 Mercedes-Benz C-Class

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2004 E270 CDI Battery light visit workshop

2004 E270 CDI Battery light visit workshop constantly on.
Had both batteries replaced and alternator tested okay

What could be the issue??

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I had the same problem in me 2004 cdi e270. Check the voltage going to the battery when the car engine is on. Stedy charge of 12v should be going in to the battery, if the voltage is volitale say between 11v to 14v then it your Regulator (which is attached to the backend of the alternator). You need to change alternator and then unplug all the batteries over night and re plug them back again. The problem should go away.

Posted on Nov 25, 2011

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