battery alternator - 2006 C230 - Mercedes-Benz Forum

 
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post #1 of 7 (permalink) Old 01-25-2013, 12:04 PM Thread Starter
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Angry battery alternator - 2006 C230

Last night, while returning from school, my car showed the message in red - "battery alternator. visit workshop". It cranked up but would not run and the rpm was very low. After about 30 mins, the message went off by itself, rpm increased to normal value and I could drive back to home.
Today morning again I had the same problem. This time I had to wait almost 1 hour with the message until it went off by itself and I could drive.
What is more disappointing is that, I drove to the Mercedes Dealership (hartford, CT) and they said they could not find any problem (bcz the message was not there at that time). They said they checked the battery and the battery alternator and did not find any problem. They asked me to call the Mercedes 24h roadside assistance if I had the same problem. Wtf, the dealership cant diagnose the problem and I have been paying so much for the servicing every year?
Anyways, if you had any similar situation and know what is going on, please let me know. I appreciate your suggestions.
Thank you guys
Have a great day
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post #2 of 7 (permalink) Old 01-26-2013, 10:29 AM
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It is typical for wear out alternator brushes to act for some time before they will go permanently.
Get new voltage regulator or brushes if they are available in your county.

Last edited by Kajtek1; 01-26-2013 at 10:37 AM.
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post #3 of 7 (permalink) Old 01-27-2013, 10:01 AM
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Quote:
Originally Posted by debargha View Post
Last night, while returning from school, my car showed the message in red - "battery alternator. visit workshop". It cranked up but would not run and the rpm was very low. After about 30 mins, the message went off by itself, rpm increased to normal value and I could drive back to home.
Today morning again I had the same problem. This time I had to wait almost 1 hour with the message until it went off by itself and I could drive.
What is more disappointing is that, I drove to the Mercedes Dealership (hartford, CT) and they said they could not find any problem (bcz the message was not there at that time). They said they checked the battery and the battery alternator and did not find any problem. They asked me to call the Mercedes 24h roadside assistance if I had the same problem. Wtf, the dealership cant diagnose the problem and I have been paying so much for the servicing every year?
Anyways, if you had any similar situation and know what is going on, please let me know. I appreciate your suggestions.
Thank you guys
Have a great day
Is the car still on its original battery?

Felicita e un bicchiere di vino con un panino.
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post #4 of 7 (permalink) Old 01-27-2013, 02:50 PM
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On some of the older vehicles, the battery can have an effect on alternator function. Did they actually run a battery test? Do you have an OEM battery? What is the date stamped on the negative terminal if it is an original Mercedes battery? Sometimes it is just a battery issue and if the voltage is not stabilized, you may get that BATTERY/ALTERNATOR message. Once it is stabilized, then the message goes away because there is no longer any problem. Did the dealer also run a self-test and alternator charging test with the diag equipment? I recommend that you ask for the print-outs. I highly recommend with any electrical component, use ORIGINAL Mercedes-Benz parts. Regular batteries should last you 4 years. If it is a VRLA battery (which i doubt), same recommendation. Cheers!
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post #5 of 7 (permalink) Old 01-27-2013, 02:51 PM
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If the battery was verified to be Original equipment and it passed, then you have an intermittent problem with the voltage regulator in the alternator.
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post #6 of 7 (permalink) Old 01-28-2013, 08:26 AM Thread Starter
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Thank you guys for your valuable replies. I will contact the dealership with these questions. Will let you know what happens
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post #7 of 7 (permalink) Old 01-28-2013, 09:00 AM
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I'm not sure about your C230 - but on a W209 CLK you can do some alternator voltage checks at the cluster.

See here: http://www.benzworld.org/forums/w209...r-voltage.html
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