Volkswagen Group has agreed to shell out $200 million into a reserve created to reduce diesel pollution, a stipulation in the pending agreements made over the 3.0-liter diesels that polluted well over the United State’s legal limit.

The finalized agreement between VW and U.S. lawmakers is expected to come by Monday, pending the company’s decision on what to do about the 80,000 Audi, Volkswagen, and Porsche vehicles with emissions-cheating diesel engines still on the road. Legal representatives for the carmaker, affected consumers, and the Justice Department have indicated that negotiations are still progressing, however VW may still have to go to trial if a final agreement isn’t reached soon. 

Bloomberg reported on Friday that U.S. District Judge Charles Breyer said the parties have made “substantial progress and I am optimistic that there will be a resolution.”

The Friday hearing had been delayed for several hours for additional negotiations before Breyer gave both sides until Monday to decide whether they can reach a final agreement on resolving the ultimate fate of the 3.0-liter vehicles.

One of the more problematic elements of the deal has been deciding exactly how much VW will offer owners in compensation for getting their vehicles repaired or how much owners will receive for selling affected vehicles back to the company. Volkswagen already reached an agreement with U.S. regulators, deciding to offer buy-backs on about 20,000 older Audi and VW SUVs and a software fix for 60,000 newer model Porsche, Audi and VW vehicles.

The $200 million will join the $2.7 billion Volkswagen agreed to pay into a trust fund over the next three years. States can use the money to replace and scrap or retrofit older diesel vehicles with modern models that are equipped with better exhaust cleaning technology.