[Overdrive]

I thought the outside temp was displayed automatically...? I definitely don't have the OBC active from the factory, and neither does my sister's '99, but both always show the ambient temp right under the digital speedometer.

In any case, I had the same question not too long ago, Steve, so don't feel bad even if you're multi-Porsche owner. Now you know what the thing does, and apparently it likes to fall out of its little holder on the grille from time to time, so keep an eye out for that. It only wedges into place, doesn't have any sort of lock on it.