It's to the left, under the dashboard. If you take the access panel off to the
fuses, look inside, down to the left. You can see it, facing downward. All MK6
Jetta OBDII ports are in the same spot.
I bought a bunch of "Micro Mechanic" OBDII adapters from the AS SEEN ON TV section
in Walmart, they went down to $5.00 each, and I just picked one up for $3.00 last week.
They are ELM327 adapters, and work great.