1984 300sd power windows and power seats no electrical power

[Diesel Brane]

Hello all! I hope someone can provide guidance and steer me in the right direction in solving an electrical issue. I went out to my car and it started up normally. When I attempted to lower one of the windows it didn't move. Tried all the windows and they didn't operate either. Tested the seats and no go either, the same for the right side powered mirror. The dash gauges work as well as the dash lighting.
I took the car to a Mercedes only shop a few months ago because the right side front and rear power windows were not working. Since then all was good until this problem surfaced.
Has anyone experienced a similar problem? or have a clue as to what I should be looking for? I thank you in advance for any help you can provide

[tyl604]

Sounds like a fuse. Pop your hood and take a look at the fuses. Even if it looks OK, try switching the fuse that operates your windows. Sometimes fuses look OK but fail to work - sometimes it is just oxidization of the end of the fuse.

[Diesel911]

If all of the Windows are not working on min Fuse #12 goes to the power window relay and some other stuff.

You actually need to pull the fuse out and inspect the tips to see if they have good contact and see if the body is made of plastic. Get rid of the plastic bodied fuses.

I don't have power seats and it does not show up on my Fuse Chart.