The dipstick tube in modern MBs goes about to the bottom of the sump for just this purpose. Dealerships have a professional duty extractor that uses the dipstick tube, rather than a home brew or boater unit that has its own smaller tube.

The downsides are you can't extract oil at operating temp unless you get some high temp tubing or use a metal tube, and you don't get to inspect the underside of the engine bay. Some say you don't get out as much oil but every time I've pulled the plug after letting the extractor do it's thing there wasn't more than a half a teaspoon more that dripped.

Sixto
93 300SD