i don't know the thing just stopped. I swapped out a different window switch board with my old mans (he has a 98 e300) and that didnt fix it. I am getting a clicking sound coming out of the drivers door when i hit the switch. I pulled teh panel and there is a little plastic box with connectors going to it thats clicking...i swapped that out with another known good unit and it still didnt fix it.

anybody have any ideas? I already changed out a rear regulator once, but I dont think this is that problem as it just stopped working for no reason.

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1999 Mercedes E300 188k and still going strong!