'01 E320, US market car, 3.2 V-6, 4matic wagon. I think that's the M112 engine...

I've begun to wonder if the blown fuse was the beginning of the end of an ECU in the box, the ECU cooling fan that usually blows a fuse works fine, cycling on and off w/ ign. is on. But wouldn't a failed ECU throw some kind of code? I'm baffled with this one...