Are the German police cars still green and white?
Yeah, they are. Haven't changed much, except they got new cars.
Austrian ones are white and used to have a fluorescent orange stripe below the windows. Now they get a red stripe (both about 15 cm wide). VW Golf used to be real common, guys higher up in the police hierarchy now drive Chrysler Voyager. Volkswagen van for larger jobs.
Back in the old days they usually had Volkswagen Beetle and Puch 500 (an Austrian-made version of the Fiat 500 with different engine and transmission), usually in the Version 650TR (looked real harmless, but was absolutely lightweight (around 500kg) and had quite a heavy engine 40 to 50 HP, depending on version), so it could easily catch up with a Mercedes of those days. My Dad always tells the story of how he was used to driving a 500 at truck speed (80 km/h) uphill, and then he once drove a 650TR, going 120 up the mountain. The trucks quickly came closer!).