I got an extractor from Harbor Freight recently for $140. Here's the link:

http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=46149

It fits the Benz very well. It has a number of attachments, various sizes of steel and nylon pipes to suck through, but the point where these attach to the unit is an o-ring fitting that exactly fits the dipstick tube in my 606. I can suck through the tube itself for all that's worth, then insert a nylon pipe and suck just a bit more.

No manual pumping. It produces a 25" vacuum and is very quiet (when the air compressor isn't running, that is). That kind of vacuum will evacuate the crankcase in short order.

For a Chinese piece, it's rather nice. I had to replace the air inlet fitting to match my other connectors, but that's it for modifications.