How to Reset Mercedes Benz 7G TCU with CGDI MB?

CGDI Prog MB is possible to reset/erase Mercedes-Benz 722.9 7g TCU Transmission Control Unit.  Check step-by-step instructions below:


Run CGDI MB software

Select Auto Commuter function
Select engine type: TCU

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Check wiring diagram
Follow diagram to connect cgdi mb with TCU

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The diagram need external 12V power. must follow the diagram . Some EGS cable that customers buy from other website can not use with CGMB.

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Read TCU information

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Read TCU info success

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Press Get to get erase password

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Calculate erase password successfully.

Press Erase to reset

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Erase TCU success
Read information again

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TCU has been reset.



The EGS status , if “personalized ” option not marked , “Activated ” option marked,  the EGS has been erased by other tool . This status may will cause erase failure . you need to put it back to car to activate it first ,or use other tool to activate it . Then use CGMB to erase .

After software show you ”erased successfully ” , you need to read the EGS status to check if it correct erase . if not , reboot your cgdi ,do it again

If erase password can not calculate , send your file to CG tech support .They can help you to calculate

After you erased succeed , install TCU back to car, need synchronize with autel, mb star diagnosis etc

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