The fuse panel is under the hood, up against the base of the windshield on the driver's side, I believe. There are fuses that prevent electrical fires if there is a short ciruit in the fog lamp circuits. I am not sure about the fog lamps but normally they are on a circuit with other items, one fog light per fuse.

If both are out and nothing else is out it may not be the fuse, but you should check the fuses first. These are those funky European auto fuses and when you check them you should also spin them in their seats to try to break up any oxidation between the fuse conductor and the copper in the fuse box holders.

I also believe there is a relay that responds to the switch in the dash to turn the fog lights on, but I have no documentation to check this right now. If that is the case the relay may also be bad. Someone else will chime in about this question though.

Good luck and I hope this helps. Jim

__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)