If I'm not wrong, they also turn clockwise whether left hand or right hand drive car, only the position of the switch is at the other end of the dash(right hand side). I have tried this on my 1994 C180, but see no fog light coming on at all in the rear. I do see the extra front lights come on (fog lights) which is in addition to the low beam and the high beam. You can see this if you are facing a wall and then play around with this switch and see the light pattern changing. Its all in the Euro headlamp , no extra lamp in the bumper.