FYI, when the ECU decides the loading is within spec and allows a regen, you should hold down the accelerator and brake until the regen initiates. It helps to turn on all electrical consumers like seat heaters, defrost, etc. to increase the load:

http://wiki.ross-tech.com/wiki/index...2.0l_R4_CR-TDI

I ran it successfully on my old 2012 Passat TDI (that used UDS) and I remember buckling up my seatbelt before it worked, but that may just have been coincidence.