Volkswagen (>> Volkswagen), Daimler (>> Daimler), BMW (>> Bayerische Motoren Werke) and others agreed in August to offer buyers trading in an older diesel car thousands of euros off the price of a cleaner model as part of a deal with the German government to tackle pollution from diesel cars and avert bans.

New car registrations in Europe's largest auto market may increase 4 percent this year to around 3.5 million models, the VDA said on Wednesday, compared with previous guidance that sales would be flat on 2016 results of around 3.35 million cars.

Domestic car orders rose 4 percent in September despite one less selling day compared with the same month a year ago, though actual sales fell 3 percent to 288,100 vehicles, VDA said.

"The German market is developing more dynamically than expected," VDA president Matthias Wissmann said. "Customers are making use of these attractive offers," he said about rebates.

Incentives announced in August range from 2,000 to 10,000 euros ($11,800) at the VW brand, 3,000 euros to 10,000 euros at its luxury division Audi (>> Audi AG), 2,000 euros to 8,000 euros at Ford (>> Ford Motor Company) and up to 2,000 euros at BMW.

VW alone has received 20,000 orders from people willing to trade in older diesel models for a new Euro-6 car, and has more than 800 orders for the electric Golf hatchback, Automobilwoche reported last week.

Germany's September sales decline contrasts with gains in Italy and Spain, also among Europe's top five auto markets, of 8.1 percent and 4.6 percent respectively. Germany's KBA motor vehicle authority said brand-specific sales data will be published at the earliest on Thursday.

(Reporting by Andreas Cremer; Editing by Douglas Busvine and Mark Potter)