C240voltage - Mercedes-Benz Forum

 
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post #1 of 3 (permalink) Old 08-22-2011, 07:29 AM Thread Starter
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C240voltage

2004 c240 changed original battery due to poor voltage and ac fan shutoff while driving , replaced battery but dyno mode shows 12.3 not running and then when started goes up to 13.0 v and then drops back to around 12. V is this normal or am i in the need for a alternator .
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post #2 of 3 (permalink) Old 08-22-2011, 09:05 AM
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I'd have that alternator bench-tested to be sure.

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post #3 of 3 (permalink) Old 08-22-2011, 09:38 AM
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There is a decent probability it's the regulator, which is piggybacked onto the alternator and also contains the brushes. After removing the alternator it is quite easy to change.

Good luck.

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