New test feedback: VW Polo 1.6tdi 90cv 2011 CAYB PCR2.1 unlock by pcmtuner successfully.
[57] LACK: pcr2.1(EEPROM/UNLOCK/BDL)
EEPROM OK
UNLOCK OK
[57] VAG: 1.6TDI (pcr2.1)
Read ID OK
READING OK
WRITING stage 1 OK
I have done several with kess v2 but PCMtuner works better and more simple.