VW declined to comment. Sources close to the board told Reuters this week the supervisory board was looking at ways to make savings to try to avoid a downgrade in the company's credit ratings, which would lead to higher borrowing costs. They said, however, it was not talking about asset sales, after calls from some analysts for the firm to sell its trucks business or brands such as Bugatti, Ducati and Lamborghini. VW has said it will refit up to 11 million diesel vehicles that contain software capable of cheating emission tests. It also faces potential fines from regulators and prosecutors, lawsuits from consumers and investors, and a possible hit to sales from the damage to its reputation. A survey by German market research firm Puls showed 41 percent of consumers see the brand as damaged for the long term, while 11 percent say they no longer want to buy a VW, the Frankfurter Allgemeine Sonntagszeitung paper reported.