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I have a 2001 C320 with 60K miles. Recently I'm getting the "Undervoltage Consumer Defective" warning message. What does this mean?
 

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Undervoltage consumer defective

I have the same error message. Did you ever receive an answer to what this error message means? Is it the battery?
 

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That is so tempting.... Reminds me of PEBKAC, which I use all the time at work. Sometimes swapping the P with the persons first initial.
So you'll have to tell us/me where this message is popping up? Like the dash, OBD2 code, your phone? And under what circumstances.
 
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