German carmakers and politicians are meeting in Berlin at an "emergency diesel summit" this week to try to shore up eroding market share amid concerns over pollution in Europe's major cities.
They also hope to put to rest a major scandal over the manipulation of emissions testing data.
NPR's Soraya Sarhaddi Nelson reports that the two sides are expected on Wednesday to agree to lower emissions of smog-causing nitrogen oxides in Germany's 15 million diesel vehicles.
Soraya says that in the lead-up to the summit, manufacturers and the German government haggled over reducing emissions by improving auto software, something that would cost several hundred million euros. Alternately, hardware fixes would be far more expensive – estimated at around 5 billion euros ($5.9 billion). In either case, much of the cost would be absorbed by the companies.
Germany is Europe's leading car manufacturer, and Volkswagen — the company at the heart of the faked emissions testing data — is among the world's largest carmakers.
As NPR's Bill Chappell reported in 2015, Volkswagen had installed "test-cheating software on 11 million vehicles worldwide" that misreported the emissions data. In the U.S., the software was installed on more than 480,000 diesel VW and Audi vehicles.