Computer problem
1997 BMW M3 6 cyl Two Wheel Drive Automatic 169000 miles

I have an issue with my lock,where I assume the fuse had blown but i have replace many of the fuse but my lock still hasn't work currently I have to lock all my doors manually i ask around and they say it the car locking relay but they don't seem to where its located and I obviously don't either So I wondering what seems to be the problem and my trunk is always unlock and my key don't seem to work with the car either I'm just confuse

It is most likely the drivers door lock actuator.