Three more states in the US have adopted the same strict emissions regulations enforced in California, which means carmakers like Mercedes-Benz who’s current diesel models don’t meet the new regulations are forced to temporarily suspend sales of the oil-burners. The new states include Pennsylvania, Connecticut and Rhode Island, bringing the tally of states that 2008 model Benz diesels are banned from up to eight.

Mercedes has been eager to increase the popularity of diesels in North America and has been touting the benefits of its new clean-diesel Bluetec range. According to officials, the new Bluetec ML320 CDI due in roughly 12 months will be the first Mercedes diesel compliant in all 50 US states.

Lost sales in the three additional states won’t hurt Mercedes considerably as its diesel numbers are already very limited, and any extra cars are expected to be absorbed by the other 42 states.