I did a quick search for "aspirator" and found a bunch of responses. I usually struggle with the search function, but this time it worked for me. It seems everything is buried in the archives somewhere.
Mike Tangas posted this for W126's:
"Open and empty glove box. Remove the centers from the seven "plugs", then pull the plugs. Disconnect the glove box light and remove the glove box liner (it will take a bit of tugging - tight fit). Once the liner is out, you'll see the sampler blower just behind the vent. One hose and one two pin connector. The blower just snaps into a mount.
Word of caution, it is easy access but a tight fit depending on hand size. I had to use two hands to reconnect the hose and found I drew a little blood on the back of my hand, where it rubbed against the sharp edge of the glove box opening."
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".