Mercedes coil bizare.... strange data read

[Belloriccoefamoso]

Hallo
i have a Mercedes key with broken coil
i had changed 2 times the coil but result no change
when i try read the key with MB IR PLUS to check my job
i have different results depend position of key
can someone help me understand results and why so strange/different?

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[Belloriccoefamoso]

where could be the problem?
i use new coils with impedence of about ohm 1.1
i had used them in other keys and all ok