1999 Mercedes-Benz C280 Q&A

1999 Mercedes-Benz C280 Question: Electrical Problem ? windows,seat power,mirrors

Windows all or some stop working,power mirrors stop, some time only one,power seats stop. OK when I disconnect battery everything will be perfect for a few days or week. then problem starts again. I checked all grounds. I think the problem is the part under passenger side floor carpet thair is a electronic part under plate looks like a control Modual. I dont know whar it is called.? -
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