Airstream has built the Interstate on the new Mercedes chassis and they are going to announce in LA. They call in model year 2014 and a half. My local dealer has one already and there are a lot of changes in this model...more than most people hypothesized.
New styling including radiator grill, fenders, front hood, bumpers, bi-xenon lamps, chrome step/license plate holder.
Bi-xenon lamps are extra bring and offer low and high beam.
New steering wheel is thicker and has new multi function design.
New Mercedes branded stick shift.
Safety features: collision prevention, blind spot assist, parktronic on all models (not just 24 foot), lane keep assist, high beam assist...calling it the safest Mercedes Sprinter ever built.
New Alcoa Dura-bright non-polish wheels - stay brighter without polishing.
Wider driver and passenger steps.
LED lit awnings.
New Marine style plank flooring - read vinyl to look like wood. It's ugly in my opinion and may prevent me from buying it.
Insulated, monogrammed privacy curtain.
New magic suede fabric throughout - more durable, improved strain resistance.
New Samsung Blu-Ray player - High def audio, Netflix, YouTube, Pandora, and Internet.
New Samsung 22 inch TVs (replacing the 19") - High def capable.
New Kenwood DD-990 infotainment center - built in wifi, voice dialing, bluetooth streaming remote controlled.
I'm excited about the changes and it definitely has me thinking about making a purchase soon. None of these are dramatic enhancements like a new floor plan, etc but nice evolutionary enhancements on the newest, safer chassis. The overall price increase is about $5K more.
You can see a couple pictures here: Airstream To Reveal 2014 Mercedes-Benz Sprinter-Based Interstate RV in LA - Truck Trend