We're not trying to do a Jack Ward (judge) in the movie, In justice for all, are we. Seriously, at 0, tank gauge reading, the little gas pump begins to flash soon after.
I know some might think its similiar to running a gas motor out of fuel, but if you read up, there are more things going on in a diesel, so all I read says don't run it out. The fuel delivery system is under much greater pressures, than a gas fuel system.
MB says 26.4 gal capacity. That x the Avg. Mpg =total distance per full tank.