[DWBOX2000]

The windows in my 94 Merc e320 work intermittently. They all work or they all don’t work. They have been not working for about 2 weeks but worked for about 2 weeks prior. This has been going on for months.
The fuses are new, I swapped out electrical box under left rear seat with my parts car that the windows work. The wiring going into fuse panel feel secure and clean. It has 2 fuses which makes me think there are 2 circuits. Why both would stop working, I haven’t the foggiest. Anyways, I got the engine light to turn off, the ERS light (swapped airbags) and this is the last thing to fix.
Any suggestions? I have a parts car where the windows work so I can swap stuff.
Thanks.