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when installing a new rear SAM, does this year car required the rear be reprogrammed. car was running fine then it suddenly shut down and would not turn over. Cracks but will not turn over. Replaced crank shaft position sensor and camshaft position senors..still will not turn over. tries too but continues but will not turn over.

Answers from the Automotive Experts

Jessica Howe, Automotive Expert & Coach at


Thank you for writing in. The rear SAM module for your model does need to be reprogrammed. Often programming is not performed or is performed improperly leaving the system unable to communicate as designed. Reading diagnostic codes alone will not help solve the problem. You will need to find a qualified Mercedes technician who has the right computer program to recode the sensor. 


Good luck!

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