Diamond DA 40 Flight Manual page 66

Operating
Limitations
Next to the Fuel Quantity Indication:
a) Standard Tank:
Up to serial number 40.054:
Serial number 40.055 and subsequent:
b) Long Range Tank (if installed):
Page 2 - 26
max. indicated fuel quantity: 15 US gal
left and right tank max. 10 US gal difference
For use of max. tank capacity see AFM
max. indicated fuel quantity: 17 US gal
left and right tank max. 10 US gal difference
For use of max. tank capacity see AFM
Fuel qty. indication: 16 + 9 US gal
max. difference LH/RH tank: 8 US gal
AUX FUEL QTY switch for LH/RH auxiliary fuel quantity
NOTE: See AFM for more information on AUX FUEL
Rev. 8 01-Dec-2010
EASA
Doc. # 6.01.01-E
approved
DA 40 AFM