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Mercedes E350 Dead Command Unit

This weeks interesting job was on a clients Mercedes E350. Customer stated the radio, navigation, screen was complete black (in-op). Checked the basics and everything looked normal, but after connecting our Star diagnostics, it showed no communication with the command unit. 

Once we replaced the command unit supplied from Mercedes-Benz direct (factory part), we loaded the telematic DVD that is only supplied from Mercedes headquarters to authorized independent shops. We then mated the unit to the vehicle permanently thru SCN coding. 

Proof you need to take your vehicle to the proper repair facility to get the job done right. Our client now has his E350 wagon back on the road working correctly, good thing because he drove 2 hours to have this work done here.