Diamond DA 40 Flight Manual page 208

Mass & Balance DA 40 AFM
Rearward Flight CG Limit:
2.59 m (102.0 in) aft of Datum Plane (Standard Tank)
2.55 m (100.4 in) aft of Datum Plane (with Long Range Tank installed)
Page 6 - 14 Rev. 8 01-Dec-2010 Doc. # 6.01.01-E