Electrical problems

Electrical consumers malfunction ive changed both batteries alternator same problem ac blows on lowest speed inside light dnt come on.only when car is off 

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MercedesMedic made a comment.
1 year 2 months ago

You need to scan for codes. There is a problem most likly with the SAM unit or Central Gateway module. Without using a scan tool it would be difficult to find out.

 

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