Well, in any event, you found it.
That fan in the picture looks like the aspirator motor, although mine is much smaller.
FWIW, Mercedes is making this part smaller and smaller. My mechanic showed me one from a W202 C class, and it was at least half the size as mine.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".