is an Autobahn in Germany. The A 100 encloses the city centre of the German capital Berlin, running from the Wedding district of the Berlin-Mitte borough in a southwestern bow through Charlottenburg-Wilmersdorf and Tempelhof-Schöneberg to Neukölln. It is connected with the Bundesautobahn 111 (A 111) at the Charlottenburg interchange, with the A 115 (the former AVUS) at the Funkturm junction, and finally reaches the A 113 at its southeastern terminus in Neukölln, all linking it with the outer Berliner Ring A 10. The route in most parts runs parallel to tracks of the inner circle line (Ringbahn) of the Berlin S-Bahn.