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Error message: "undervoltage consumer is defective"

Rock

Member
Joined
Mar 4, 2011
Messages
51
Car
Mercedes C200K
Hi all,

Ive had this error message displayed when ive entered a underground parking area and when my head lights came on. It hasnt come back on again so abit confused.

message: " Undervoltage consumer is defective"

Prior to the message my rev was all over the place specially at morning startups (cold starts).

Ive read few treads and some say its the battery and others the alternator, so not sure what to do?

any help or advise will be appreciated.
 

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