There's an oil extractor called "Topsider" that I believe was originally developed to drain oil from boat engines (Since they're usually precariously positioned making it impossible to get a pan under them.) A lot of people use the Topsider for cars, and the consensus seems to be that once the novelty wears off (about 2-3 oil changes) that they really don't save you any time.
(If you're inclined to research it, go here: www.mercedesshop.com
There's a very active forum there -- to which I belong for my other car -- and the subject of the Topsider oil extractor was quite hot and heavy over there about a year ago.)

As far as the transmission, I don't see how it can get any easier than cracking one of the cooling lines, putting a vinyl hose on it, and letting the transmission pump the fluid out.

That being said, there are many times when I could use a vacuum source and/or a fluid extractor around the shop, or even around the house. And at $55, it's a bargain. I have a Motive pressure bleeder, and I am very impressed with it's performance. I would anticipate the same quality in this extractor. I think I'll pick one up.

Thanks for bringing it to our attention.

Jeff Pierce
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'93 945 Turbo ( one kickass family car ! ), '92 Mercedes 190E (my daily driver), '53 Willys-Overland Pickup (my snow-plow truck/conversation piece -- sold to a loving home), '85 Jeep CJ-7 w/ Fisher plow