It turns out that the wire beneath fuse #4 which connects it to the fuse box was kind of loose and the little rubber sleeve had slid down a bit. I slide the slleve back into posistion and what do you know. All fogs are working again.

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1995 E420 152k
1991 300D 2.5 348116 daily driver
1992 300E 2.6 196k-work in progress(head gasket)
2002 BMW 745Li 93k

Glad you got it fixed.

I checked on my 1990 300D & it only has the two fog lights in front and not the third in the rear.

Me too. I'm not quite sure why some have three fogs and others don't.

__________________
1995 E420 152k
1991 300D 2.5 348116 daily driver
1992 300E 2.6 196k-work in progress(head gasket)
2002 BMW 745Li 93k