Attorneys who represented consumers in the Volkswagen AG “clean diesel” litigation before class counsel were officially appointed want the U.S. Supreme Court to wade into their fee fight.

The U.S. Court of Appeals for the Ninth Circuit ruled in January that only attorneys chosen as class counsel in the consolidated litigation, and those working on assignments from that counsel, are entitled to a cut of the $175 million attorneys’ fee award.

But that decision is unfair to attorneys who worked...