How to Erase Mercedes W221 EIS and Program New Key with CGDI MB

When we try to program a new key into Mercedes, we find that the all key positions are used.  We need to erase EIS at this time and then program new key.  Here’s the guide to erase W221 EIS and make a new key using CGDI Prog MB key programmer.
Step 1:  Calculate Password and Erase EIS
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Connect CGDI MB with vehicle, choose“EIS”function,click to read EIS data
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Read successfully,CGDI shows all the key positions are used
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Collect data first,compute password
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Default“Other key”,click ok
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please insert the key into EIS and click OK
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Please insert the key into the CGDI MB device and click ok
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It is collecting with key,please wait …
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Please insert the key into EIS and click ok
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please wait patiently for 10 seconds
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please pull out the key from the EIS, and then click ok
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please insert the key into the EIS again and click ok
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Pull out the key for 5 seconds, then insert into EIS, then click ok
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please insert the key into the CGMB device again and click ok
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Collection end,save data,default file name
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Save the file successfully
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Click“Upload data”
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Open the data just saved
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Upload data successfully
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Querying,please wait…
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Computing success,click ok
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Click ‘Copy’
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Go to “EIS”,and copy the password
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Save the EIS data with password successfully
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Get erase password,wait a few seconds,show that calculated successfully
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Click“Wipe the EIS”
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please insert the simulation key into the EIS in 30 seconds……
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simulation key physical operation diagram
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Erase the EIS success,click ok
Read EIS data again,show the related information after erasing
Click ”Load EIS Data”
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Open the EIS data just saved
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Click“ Write EIS Data”
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Click ok
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please insert the simulation key into the EIS in 30 seconds
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simulation key physical operation diagram
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Write EIS data success
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Read EIS data again,showed as above picture
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Insert the original car key into the lock to learn and start
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Read EIS data again,left origin key position data only,erase key position data successfully
 
Step 2: Program New Key
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Go to “Generate EE”,load EIS file just saved
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Load successfully,please check the information to see whether it is correct
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Click“Generate key file”,please wait…
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The key file was generated successfully,please save data file
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Go to “Read/write key”
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please insert the new key into CGDI Prog device
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Click ”read key”,show key information
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Click ”write”,please read the prompt carefully,click ok
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Choose一unused key position data,click and open it
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Write success
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please insert the new key into EIS to learn,start the car after learning
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Read EIS data again,show √.
Program new key successfully.
https://cgdi-mb.blogspot.com/2018/08/cgdi-mb-erase-mercedes-w221-eis-and-program-new-key.html
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