As I suspected, the original issue with this posessed VW was still waiting to strike after repairing the "built-in" problems from Part 1.

Sure enough, as soon as I left the car with the customer, it decided to rear its ugly head.

We're back on at in the next day trying to recreate the customer complaint.
Turns out to be a cool diagnosis, and an even cooler repair!

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Enjoy!
Ivan