You cannot use a standard cheap OBD2 scanner for this level of coding. You need specialized hardware to act as a bridge. The Multiplexer
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Vediamo is the heavy-duty diagnostic and calibration software used by Mercedes engineers. It communicates directly with control units via CBF (Control unit functions) and SMR-F files. Unlike XENTRY (the dealer tool), Vediamo allows raw value changes—it doesn't restrict you based on VIN. You cannot use a standard cheap OBD2 scanner
These files contain the ECU descriptions and diagnostic data. mercedes coding guide book vediamodts monaco 2021
of the module to force it to reboot and initialize the new configuration. Verification