CREATE TABLE table_16105186_2 (mid_atlantic_south__washington VARCHAR(255), _dc_ VARCHAR(255), midwest__des_moines_ VARCHAR(255))
What was the emission rating in Mid-Atlantic South for the vehicle that was rated 300 g/mi (186 g/km) in the Midwest?
    
SQL: SELECT mid_atlantic_south__washington, _dc_ FROM table_16105186_2 WHERE midwest__des_moines_ = "300 g/mi (186 g/km)"