First of all, what kind of driving lights are you puting on?? (I have wanted to make the fog lights be DRLs, but have yet to get around to it.)
Yeah, sounds like your convenience relay, which is in the trunk by the fuse box back there. So none of the windows or sunroof operate, try using the key in the door to see if you can get them to open.
(Just in case you don't know how to do this, lock the car with the key, then unlock the car with the key, but when you turn the key to unlock it, HOLD it there for atleast 2 seconds, when the windows and sunroof should open.)
Keep us posted.
2006 E350 w/ 155k miles (Daily Driver)
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)