good question - I have heard conflicting things. I think officially it might be difficult given it doesn't have the U.S. safety stickers. But, depending on how rigourous your state's DMV checks and balances are, you may be able to get it registered and insured given it's the same car as was sold in the U.S. Actually it's much better than anything sold on this side of the pond!
If there are no US emissions decals in the engine bay, you won't be able to get it across the border, unless you have a letter from MB stating that this particular vehicle is US emissions compliant (its not).
So, you would have to use a registered importer to bring the car into the US, then the vehicle would have to go to NY to be converted to US spec emissions, that will run about 7k, then the registered importer can convert the vehicle to US (Dot) spec's (e.g. cluster, side mirror glass, door braces, headlights, tail lights, seat belt warning buzzers/lights etc. etc.). So your looking at another 4-5 grand, plus the customs bond (double the vehicle value) that needs to be posted. Once you have completed all the work and a US replacement VIN has been assigned, your bond will be refunded and you can register your car!
With that said. If you decide for some reason to part out the car, I would be interested in the motor, ECU and EZL.