There is one thing i`m not sure of. The Kadett has the Pontiac-brand and the radiator cowling (i hope you know what it is. I didnt remember the word) is also like the pontiac-type kadett. So it could be a Pontiac LeMans. But the Pontiac LeMans isnt produced (because Kadett and LeMans are the same car )in germany so why should the actor have a Pontiac. Imported?

http://en.wikipedia.org/wiki/Image:Pontiac_LeMans_Hatchback.jpg