So, this thread is sort of dead, and the subject line doesn't specifically state anything beyond 2015-16 models, so I may start a new thread for 2017-'19 owners.
For anyone with 2018, this fix does NOT work on the 2018 model. I'll photo the service doc and TT issues in the new thread. Basically, there's a step "Select 09- Calibration" and press "Perform", then "Adaptation Channel 5..." (noted in this thread), however, the "08 - Calibration" item doesn't even appear in the menu. Tech felt my pain, agrees this is incredibly dumb. I got the TT printed and highlighted the section missing. I will pursue VW Customer Care and capture on new thread.