My 1999 E320 seat adjustment buttons are not working properly. They come and go. The windows occasionally do not work.

I have checked all the fuses and they were fine.

I replaced the electrical console. I think it was called the electrical switchboard for the windows. The windows work more often than they were but that might had been a coincidence.

Is it time to take it to a professional? Is there something more that I can try myself? I am already out $350 on that electrical part that goes under the center console under the window controls.

THANK YOU soo soo much for any advice
Julie