Yes - I know the fan works, I've done the repair before.

I did receive an email that indicated a W126 part would work.

The pictures I find on line show look like the electronic component on the new ones looks the same as the one used on a 93 S class (and similar). These look like they can be found for ~$125 or even ~80 on evilpay, you would then have to attach it to your old heatsink and change connectors. Neither of those things is a big deal but I wanted to know about the actual component.

I have found a used 124 regulator for $60 which is my solution for now.

I do have spare heat sinks and questionable motors sitting around (meaning they will spin up if wired directly to 12V, if someone has a used/spare S class regulator to experiment with I'll give it a try and report back.

Paul