1984 Mercedes Benz 380se Benz window trouble - not switches

Electrical problem
1984 Mercedes Benz 380se V8 Automatic 125, 00 miles

I had two windows stop working at the same time today (and it's raining now - of course) the drivers window and the opposite side window in the back seat. The other two windows still work. So I doubt it's switches unless three went out at once, while the car was parked. I checked all of the fuses and they all tested good (ok - well being a single girl I had the handyman across the street check them). But I tried a new fuse anyway - nothing. I tried switching the appropriate amp (well same color anyway) fuse from another spot where I knew it worked - nothing. So other than fuses and switches what can I check? And please be detailed. Or is this going to be a weird loose wiring nightmare situation. I've had the car for less than a year, and I have to say in my 30 years of owning cars this one is probably my favorite of them all.

Thank you