C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Alternator light on

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Old Aug 13, 2014 | 04:00 PM
  #1  
aranala's Avatar
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2005 c230K 1.8l
Alternator light on

had my corner mechanic replace the alternator on my 2005 C230K. With only 40K miles. BTW , I love this car, six sp manual.
Used original equipment Bosh, rebuilt. Part was 335 UD plus 150 labor vs 1100 at dealer dor alt plus 1200 labor. Battery check indicated batt. was all right..
However computer warning , red light indicator of alternator or Battery failure does not turn off.
Do I need to take car to the dealer to clean up message and pay 300 bucks?
Does it actually do anything to keep warning on?
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Old Aug 15, 2014 | 07:58 AM
  #2  
LILBENZ230's Avatar
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2019 G70 6MT & 2022 Ford Maverick XL
Did that replacement alternator include a new voltage regulator? If not, that may be your culprit. You can put the car in dyno mode (search) and view the voltages.

I'm dealing with this right now on my E.
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Old Aug 15, 2014 | 08:13 AM
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aranala's Avatar
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2005 c230K 1.8l
Alternator

Yes, of course.
Alt. is charging 14000 plus. Batt shows. 12.7 Volts.
Is ONLY the light that will not turn off.
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