Regarding the fog lights, I'm guessing your car has the stock fog lights that are located on each side between the headlights and the grill. They are part of the headlight assembly.
If your asking about lights below the bumper, I don't know if they're stock or after-market.
I do recall a cut-out on the right side below the bumper (on front spoiler) of an 87' 560SEC that I couldn't figure out what it was for. I figured it out when I got my SDL. It's where the power cord comes out to plug in the block heater.