Could be a sticking float given a false reading but both levels on each side of the tank can be read with Vida and they should be within a few litres of each other.
Any anomaly is easy to spot.
Alternatively, your in tank pump could be dead and not pulling fuel across the tank meaning you have enough fuel in the tank but no way of accessing it hence why it breaks down before actually empty.
In that situation, a quarter of a tank or so has to be treated as empty to avoid getting caught out.
When there is sufficient fuel, the Euro 3 D5 can run without a functioning tank pump.
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2002 S60 SE D5 Manual
209000 miles
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