This article is from the Europe FAQ, by Yves Bellefeuille email@example.com with help from Martin Rich M.G.Rich@city.ac.uk.
In Germany, on the "Autobahn", there's no fixed speed limit; however,
it's recommended that you drive no faster than 130 km/h (about 80 miles
per hour). If you're driving faster than this and have an accident, the
onus is on you to prove that you weren't at fault. Note that there
frequently are "local" speed limits even on the Autobahn.