FILE PHOTO: German Transport Minister Andreas Scheuer attends a news conference on Diesel issues in Berlin, Germany, October 2, 2018. REUTERS/Hannibal Hanschke

BERLIN (Reuters) - German carmaker Volkswagen VOWG_p.DE has agreed to help with hardware retrofits for diesel cars but some details still need to be discussed while BMW BMWG.DE has refused such retrofits, German Transport Minister Andreas Scheuer said on Tuesday.

He told a news conference that Daimler DAIGn.DE has said it could consider hardware retrofits but would concentrate on trade-in incentives of up to 5,000 euros ($5,755.50) that encourage vehicle owners to switch their older diesel cars for newer, cleaner ones.