Hello , dear friend , don't worry . let me answer your question .
1, if you have one key of your car ,only one is ok ,you can choose ak500 ,or ak500 pro to copy many same key .
2, if you don't have any key now , you need buy a new benz key , only type is same , the key information will be not same wih your car ,and then you need change your car immo information is same with your new key .you can choose mvp /t300/sbb tool copy your new key information to your car .
any questions please feel free to ask me ,my skpye is : or-tina
my email :
or-tina@hotmail.com