[tony_fury]

Like Mike said,
My understanding is that if the Outside Temperature is being displayed then the OBC has already been activated.
The On-Board Computer is an option that gives you these values:
Temperature, Distance To Empty, Avg. MPH, and Avg. MPG.
To control it, an extra stalk is added to the steering column.

Did you add the column stalk or was it equipped when you purchased the car?
Every OBC hack document I read stated that the dealer has to enable OBC prior.

I was also told that it is enabled when the sport/touring option is enabled.
(I can't validate that, maybe some else can chime in)
T