In Reply to: A good question..I would like to know also ! posted by Anil on February 23, 2000 at 14:33:26:
My US 535i had the socket in the rear. Just the drivers side.
I got a bulb and holder from my dealer and a 3 way headlight switch (you know off/driving lights/headlights)
Replace your 2 way Foglight switch with the 3 way headlight switch, put the bulb and holder in.