announced their latest batch of
engined variants of the E, R, ML and GL class in 2006 they were labeled as forty-five state legal because they didn't yet meet the Tier
for California and four other states. Unfortunately, for the 2008 model year they also won't be legal in Pennsylvania, Connecticut and Rhode Island because the California standards take effect in those states this year.
For 2009 the ML320 will again be available in all fifty states when
adds the more advanced Bluetec system with urea injection. The other three models get the more advanced after treatment system for the 2010 model year.
[Source: Auto Observer]