U.S. District Judge Charles Breyer on Tuesday delayed a court hearing set for Wednesday on Volkswagen AG’s plan to address 80,000 polluting Audi, Porsche and VW 3.0-liter vehicles.

In a court filing on Tuesday, Breyer said negotiations are continuing between the German automaker, regulators, and lawyers representing owners and set a Dec. 16 hearing, saying he had been advised that a delay “may produce a resolution of the outstanding issues.”

Earlier this month, Reuters reported that Volkswagen had reached an agreement with U.S. regulators for a mix of buybacks and fixes for the 80,000 polluting vehicles. The agreement was said to include a buyback offer for about 20,000 older Audi and VW SUVs and a software fix for 60,000 newer Porsche, Audi, and VW cars and SUVs, sources told Reuters.

Talks are ongoing between lawyers for the owners and Volkswagen over compensation for the owners ahead of the now-delayed Wednesday court hearing.

Volkswagen vlkay has already agreed to spend up to $16.5 billion to resolve U.S. diesel emissions cheating allegations. VW previously agreed to spend up to $10.3 billion to buy back as many as 475,000 polluting 2.0 diesel vehicles. Court documents show that at least 60 percent of those owners have already signaled they plan to sell the vehicles back.