Berlin Tegel (TXL) - both - thanks to Rainer Bertz for confirmation

Cologne (CGN) - clockwise

Dusseldorf (DUS) - both

Frankfurt (FRA) - both

Hamburg (HAM) - clockwise

Hanover (HAJ) - counter-clockwise

Leipzig Halle (LEJ) - counter-clockwise - except a broken one - thanks to S Engel

Lubeck (LBC) - counterclockwise - thanks to Jim Teeling, Ilfracombe, Devon

Nurnberg (NUE) - clockwise

Saarbrucken (SCN) - clockwise - thanks to Andrew Simpson