When his car needed weeks of transmission work and his dealer was out of loaners, Myles Arnett was sent to a nearby Hertz rental-car lot. He had his pick of Nissan Altima and Sentra sedans to choose from -- and little else.

Fewer new Mercedes-Benz models are making their way to Fifth Avenue to be bemoaned by Donald Trump -- and those that do are increasingly likely to have been built in the U.S.

With President Donald Trump’s withdrawal from the Paris climate pact, the leader of the U.S. state with the strictest clean-car rules is turning toward Beijing in his longtime mission to stem automotive pollution.