|Bundesstrasse 409 in Germany|
|Operator:||Federal Republic of Germany|
|Overall length:||16.5 km (historical)|
|Status:||graded to the state road|
The federal highway 409 (abbreviation: B 409 ) was a 16.5 kilometer long German federal highway in the northwest of Rhineland-Palatinate . It led from the Belgian border near Steinebrück (municipality of Winterspelt) via Winterspelt , Habscheid to Pronsfeld , where it ended at the B 410 .
On the Belgian side, the route of the former B 409 is continued as the N 646 in the direction of Sankt Vith .