Baud rate mismatch or battery voltage drop. Solution: Set Baudrate=115200 in EDIBAS.ini . For the 2012 E89 , you must use an Icom clone or a modified K-line cable with a 1N4001 diode.
When you download or extract an SP-Daten pack, it typically contains three vital subfolders that must be integrated into your existing BMW Standard Tools installation: BMW SP-Daten v44 E89 -2011-2012- - MHH AUTO - Page 1
Without the correct SP-Daten, the diagnostic tool cannot understand the car’s specific hardware configuration. Baud rate mismatch or battery voltage drop