Thanks for the info Simon, but unfortunately I've been monitoring the gauge for 3 or 4 months now and it was only last night that I confirmed in my own mind that there is definitely an issue.
I know this because on 2 previous occasions, I've refuelled albeit with the ignition on (not engine running, as last night) - and both times the gauge has moved, although not to the extent that I was expecting for the quantity of fuel added.
The last time, the gauge started rising as I pulled the pump trigger, but stopped on a quarter tank whilst I continued filling. Again, the gauge shot up once the ignition was turned off then on again.
Having also had numerous other 75/ZT variants over the last 20 years, this car's gauge just isn't indicating the fuel level as I've come to expect from the model.
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