Here's the answer to the questions, it must be certified by a mb dealer for the remaining balance of the factory warranty to be valid in the USA, if it's a extended warranty it cannot be transferred into the USA and you cannot apply for your own MB extended warranty.
http://www.mercedes-benz.ca/content/...lity.0001.html Like many have said, you really don't want to be driving these cars out of warranty as repairs can be very expensive, first thing I did on mine was buy the extended MB Warranty, so I'd look elsewhere if I were you, not worth the hassle and the no extended Warranty factor.