Complaint: When starting the Mercedes-Benz Apps, the error message “Data connection temporarily unavailable” appears in the head unit.
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Cause: Due to a model coding error on the HERMES communication module (N112/9), the WLAN connection between the head unit and the HERMES control unit is deactivated.
Remedy: Encode the software calibration number (SCN) on the HERMES communication module (N112/9) with the help of XENTRY Diagnosis