[pullesnoter]

Siemens dmes on BMW do not virginize well. Most of the time the ISN doesn't write over the FF FF FF FF FF FF and you're stuck with sync -> start car once. Let it sit 10 minutes, no start. Sync again, start.

Then read fullflash and you have FF FF FF FF FF FF still.
On Bosch ecu it works all the time, not recommended for Siemens.

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Best choice when missing original dme is to read EWS (PA Soft or similar) and apply the ISN to your replacement dme.


Or EWS delete...

Thank u all for this help. I will try to have a flashdump and try out this solutions.
For deleting the ews im afraid to have more problems, keytransponder...