ATLANTA — A federal appeals court is upholding a ruling that says union supporters can leaflet fellow employees inside a lobby of the Mercedes-Benz factory in Alabama.

A decision released Monday by the 11th U.S. Circuit Court of Appeals came in a United Auto Workers complaint filed against the German automaker before the National Labor Relations Board.

The board ruled two years ago that Mercedes was wrong to stop union supporters from handing out literature inside the atrium at its non-union plant west of Birmingham.

The company appealed, and the 11th Circuit sided in part with the union. It did instruct the federal agency to review its original decision saying workers could also leaflet in team centers near the assembly line.

Mercedes didn’t have any immediate comment on the decision.