I did my first proper tank refill yesterday on my D4 FWD Manual.
I am used to computers that fib as to how much fuel is left (my Toyota would say I had a range of 20 miles when I could put on 55 litres in a 60 litre tank).
Anyways, being dumb, and making a 70 mile motorway journey, I ignored the Reserve light (which came on at around 50 miles left) and went off the trip computer telling me the range left.
When it got to 20 miles left I decided to leave the motorway and get to a fuel station.
On the slip road (uphill) the range went from 20 miles left to "---" and stayed like that for 2 miles to the petrol station.
I was expecting to get about 65 litres into the fuel tank.
I actually managed to put in
73.08 litres -
definitely NOT something that I am proud of 
Bear in mind the tank is officially 70 litres, plus the plumbing from the filler cap.
Incidently, I managed
777 miles on the tank and
averaged 48.33mpg with a mix of
- about 500 miles on the motorway, locked in cruise control at 56mph - an indicated 58 mph on the computer - hey, they always overestimate, but GPS never lies
- about 200 miles on decent windy A-roads, speeding.
- the rest around town
So, from here on I will search for a fuel station when the reserve light comes on.
Has anyone ever run out of fuel, or run the fuel levels so low they got more than 73 litres in?