Audi 2003 A8 Technical Features page 40

Engine, Mechanics
Determining fuel level
The fuel level is determined by way of a
logical system of immersion tube and angle
sender signals.
a - Low levels are determined exclusively by
way of the angle sender measured values
b - High levels are determined exclusively by
way of the immersion tube sender
measured values.
c - Medium levels are determined by a
combination of all sender signals
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The sender signals are evaluated by the dash
panel insert. All senders are connected in
parallel.
The wires are bunched beneath the fuel tank,
thus enabling resistance measurements to be
taken without the need for further
dismantling.
b
c
a
SSP282_004