When racing the DTM 1992 cars at Nordschleife got some strange shadows: The shadows become square like and black. Look at the green Merc and you can se the strange shadows.
the square-shadow is the contact-shadow which appears under the cars. But yeah - it shouldn't be that big. Is Contact-Shadow activated in your graphic-settings? What are your Graphic-Settings in general?
I noticed when I launched the game today that it installed something with the number 11 in it. Anyway the problem seems to have been solved, I cant see them anymore.