Yes, standard equipment includes the Onan 2.5 Microlite propane generator. The Airstream Westfalia comes fairly loaded, the only other options being the freezer, TV/DVD combo and a surf board or kayak rack.
It's a superb machine, too! While not for everyone, the Sprinter-based rv's are the new standard for efficiency and technology in a Class B - or any - van, and the Westfalia in particular. Absolutely outstanding in every respect, it's German heritage and engineering is apparent throughout the coach, with that unmistakably high level of fit, finish and operation evident from the 5-cylinder Mercedes diesel mated with a tiptronic-type 5-speed auto transmission (22 mpg!!) to the stellar interior appointments, technologically advanced appliances and space-aged floor plan. Conceptually speaking, an awesomely sophisticated vehicle; you'll be neither disappointed - nor bored. Whether or not you use them, I would encourage purchasing the LCD TV/DVD combo and freezer; considering the price, an extra thousand or so for a fully-opted rig is not a bad investment, from either a livability or trade/sell standpoint.
A 'Westfalia' search, both here and on rv.net, should yield additional insight. Yahoo.com has a Sprinter van group and an informative discussion forum can be found on thesprinterstop.com, as well. ColonialAirstream.com also has a detailed site with excellent photographs.
FWIW, we had the 'privilege' of thoroughly inspecting the Westfalia when taking delivery of our Airstream Interstate; we were very impressed with both and have been nothing less than ecstatic ever since. Without doubt, the Interstate also lives up to it's reputation, far exceeding all expectations. Perhaps after a few more miles we'll be able to post a drive report.