I'll do a search again. Couldn't seem to find it last night. Too many posts pop up and I just read the ones with titles that seemed indicate it had the information I was looking for. (And it wouldn't allow me to type the whole phrase "auxiliary fan fuse location"!)
Does the fuse upgrade apply to all W124s or just the 500s? I'm not sure if all W124s had 2 auxiliary fans as well...