Look here: Xhorse VVDI2 cannot program keys to 2013 Passat through OBD
Q: 2013 Passat slot key AKL. Can VVDI2 program this?
A: Not through the obd.
Hint: By DUMP, not OBD
Tech support from http://www.xhorsetool.com/
VVDI2 cannot OBD program keys to 2013 Passat