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Old 02-18-2004, 02:05 AM
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Join Date: Jun 2000
Location: Saugus, CA USA
Posts: 2,033
Help, no charging

25 miles into my 30 mile ride home the lights start dimming, then SRS light came on, and eventually the car stalled. I got it push started and everything was bright for a moment then dimmed again. It brightened and dimmed a couple of times by the time I got home (with the lights off.) The alternator light never came on. What could it be? Regulator, brushes, fuses, alternator? Anything unusually different with Mercedes?

I just changed the alternator in my wifes car, could it be something contagious?

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Old 02-18-2004, 06:45 AM
LarryBible
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Put a DC voltmeter across the battery with the engine running and look for about 13.5 to 15 volts. If it is more like 12 volts, then the alternator is indeed not charging.

If alternator not charging, check connection at alternator, and remove and inspect the voltage regulator assembly from the alternator. You can do this without removing the alternator. There are two screws that hold in the voltage regulator to the back of the alternator. Once removed, see if the brushes are worn out. This is the most likely cause. If so, click on FastLane above, then online catalog and you can get a voltage regulator for $14.

Good luck,

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