Mercedes introduced a couple interesting Class B conversions at their Commercial Vans press event in Dunton Springs last month:
Sportsmobile Sprinter 4x4 Camper
The first US certified Sprinter 4wd Class B RV. This unit was converted by Sportsmobile West using the 144 (short) wheelbase 4x4 Sprinter equipped with two-speed transfer case, intake snorkel, offroad lighting, and high ground clearance wheels and tires.
Sprinter 4x4 Class B RV
Clearly a back-country oriented unit but follow-on conversions of a wide variety are expected from converters such as Winnebago, Outside Van and Advanced RV.
Mercedes Marco Polo camper
A joint product from Mercedes and Westfalia, the Marco Polo camper is based on the mid-sized V class chassis being introduced into the US for 2016 as the Metris van.
Mercedes Marco Polo at Dunham Press Event
Although the Marco Polo camper isn't currently slated for US availability it's interesting that Mercedes brought over a unit for press inspection. If the Marco Polo does become available it would fill a gap in the US small RV market that's been unfilled since VW withdrew the Eurovan camper in 2003.