I do it all the time. The first or second bump, the fuel will drop as you can never get all the air bubbles out of the tank (if you get the chance to stick your head into one of these D4 tanks you will know what I mean-bracing, wiring looms, pump, senders, baffles etc.)
The D2 was renowned for never filling up & you could get at least an extra 10L in after the initial click.
The D4 is not as bad, but you can get another few litres in at least.
Cheers
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