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Connecting CN900 4C/4D/46/48 auto key programmer with PC software, CN900 can save the read key code data unlimited, read EEPROM and special transponder, like Mercedes-Benz W140 transponder chip. Here is the picture instruction on writing Benz W140 chip using CN900 key chip copy machine and CN900 Pro 7935.
Tools needed:
CN900 key programmer
CN900 PC software (can be free downloaded from official website)
CN900 Pro 7935 chip (for CN900 only)
Instructions:
Select chip type: 44 Philips CRYPTO
Mercedes Benz C.E master transponder key programming
Click “CALCULATE”
Select key number, tick OK
Click on “PIN CALCULATE” button
W140 chip has been successfully read and written
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