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What does the undervoltage consumer defective message mean

 

Customer Question

What does the "undervoltage consumer defective" message mean? Is it serious?

 

Optional Information:
2002 Mercedes-Benz C320

Submitted: 1623 days and 18 hours ago.
Category: Mercedes
Value: $15
Status: CLOSED
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Expert:  MBGuru replied 1623 days and 18 hours ago.

Either your battery is pretty flat or the charging system is not keeping up. Need to test the charging system and charge or replace the battery if needed. Most times the battery is weak and the extra charging capacity is needed to attempt to recharge it

Customer replied 1623 days and 17 hours ago.

How do you test the charing system?

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Expert:  MBGuru replied 1623 days and 17 hours ago.

Either a VAT40 or Midtronics style tester. Oddly enough, AutoZone will test it for you for free but, I'd not have a lot of confidence in the interpretation of the test.

Customer replied 1623 days and 17 hours ago.

OK to drive the car until I can get it in?

Accepted Answer

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Expert:  MBGuru replied 1623 days and 17 hours ago.

Thats a loaded question. If it is charging then it'll be ok, if its not charging it is going to leave you stranded. However, if the consumer shutoff if the only warning, odds are it'll be ok for a little while. Would I drive it to Cali? Nope, across town, sure.

Expert TypeMercedes Mechanic
Category: Mercedes
Pos. Feedback: 99.2 %
Accepts: 510
Answered: 11/28/2008

Experience: 25 years on MB, diagnostic tech and trainer.

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