You need to look up the wiring diagram and figure out which pins are live at which key position. You already replaced the switch so almost surely you have a short to hot on the run wire.

Basically your car hotwired itself.

Did you say 4.4? I would look into the voltage supply, I forgot the nickname IVR or something

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)