I don't know if they'd fit a W124 blower motor, Willy. I kinda doubt it.

I can tell you that the brushes measure .312x.312 inch, .750 inch long. I found a picture on Schunk's European web site that is pretty representative of the W123 brush:

http://www.schunk-automotive.com/automotive/english/0_1.htm

From there, click "Products" and then "carbon brushes." The brush labeled "carbon brushes for heating fans" is pretty much what I got from them.

Russ M.