I kicked my ECU in the balls and reflashed it with 4B0906018P
Now I can read it without problems, yay
In the case somebody is scared of cross-flashing like me: The 4B0906018AR will cross flash 4B0906018P.
Read 4 ECU info entries:
0x92, System Supplier ECU Hardware Number: 0261206537
0x94, System Supplier ECU Software Number: 1037352750
0x9B, Calibration Date: 4B0906018P , 0006, 0x00000FD4, 0x00000001, 0x544F, 1.8L R4/5VT ,
0x9C, Calibration Equiment Software Number: 0x000F0B00