Do you really want to pay over $500 for a fan? The factory fan isn't cheap. Aftermarket pieces will drop in and work like the original equipment. If they have the control box, I'd simply bypass it and wire to the leads on the other side of the box. If the aftermarket guys tooled up to build the old style fan, I doubt seriously they retooled to produce an entirely new part when theirs will work.
You can try asking at a regular parts store for an aftermarket 2006 Mercedes C230 fan and see if it is the new style.

To answer your question directly, no. I do not have the number handy. I can get it at work tomorrow if you like.