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"Swiss tuning company Rinspeed is back again with its annual wacky concept, set to debut next March during the 2012 Geneva Auto Show. Called the Dock+Go, this time the finished product is a &amp;quot;backpack on wheels,&amp;quot; a single axle trailer the company says can serve as a range extender for electric cars. In this case, the concept vehicle is based on an electric-powered Smart Fortwo city-car. All you need to do is bolt the unit onto the back of your (Smart EV) car and, voila, you immediately have an extra set of wheels and better driving range.   Of course, being a concept car, the technicalities as to how the trailer truly hitches up to the donor car remain a bit fuzzy.   Who Wants Pizza?   Rinspeed believes this technology has multiple applications, including a career in pizza delivery. A wide variety of &amp;quot;packs&amp;quot; include the EV range extender, a toolbox model for craftsmen, and even a heated unit for food delivery. Rinspeed even goes so far as to say that this would be the &amp;quot;dream car of any pizza delivery driver.&amp;quot; Our guess is that an Italian offering, something with a Ferrari or Lamborghini badge, might still top that list.   Other possible uses include extra cargo space for luggage, to additional fuel storage for gasoline or hydrogen powered vehicles.   Look for the Rinspeed Dock+Go to roll all of its six wheels onto the Geneva show-floor during the press preview on Tuesday, March 1.        Rinspeed Dock+Go   "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.roadandtrack.com/car-shows/geneva-auto-show/news/a22926/first-look-rinspeed-dockgo/>