"Due to the massive claims against VW that are now out there, I'm starting to suspect that the American authorities are running the risk of pursuing an aggressive industrial policy that favours the U.S. automobile industry to the detriment of our German automobile industry," Michael Fuchs told Reuters.

The U.S. Justice Department has sued Volkswagen for allegedly violating environmental laws. The claims could in theory total up to $48 billion (33 billion pounds).

(The story corrects maximum penalty from $90 billion to $48 billion in third paragraph)

(Reporting by Gernot Heller; Writing by Michelle Martin; Editing by Noah Barkin)