My 76 Euro Mercedes had this system. The rear fog light is so idiots driving too fast in the fog can see you. It's usually mounted under the bumper and more towards the drivers side in the back. You have the ability to turn on the parking lights on the drivers side or passenger side (used when parking on the shoulder of a driveway or street) as well as the normal functions. I've never seen this on a Crossfire, but it makes sense the cars sold in Europe would have it.

Les