THE DISPLAY GOES BLACK, THE ENGINE CAN BE SWITCHED OFF ONLY VIA THE EMERGENCY-OFF.. * On board computer and navigation system goes black or resets. * The engine can only be switched off by pressing the START/STOP button three times (Emergency STOP) * Various Check Control messages are displayed. * At a minimum the following fault code is present: D91C86 - CAN message, status functional safety (ST_FSSY): Timeout-BDC * Additional fault messages may also be displayed Software error in the central gateway of the Body Domain Controller (BDC) control unit. Note: Parts replacement does NOT provide a solution!