Help with my 1994 Mercedes C220 please. - Page 2 - Mercedes-Benz Forum

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post #11 of 11 (permalink) Old 05-08-2010, 06:18 PM
BenzWorld Junior Member
Date registered: May 2006
Vehicle: 1987 300SDL
Location: Austin, Texas
Posts: 48
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Symptoms sound like overcharging. I would suspect the voltage regulator or possibly diodes. AC into a batter can do very bad things as well. It should be trivial to diagnose. Go buy a cheap digital voltmeter at Harbor Freight and measure the voltage at the battery. Check the book for the exact value, but anything over 14 volts is probably a very bad thing.
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