Audi R8 Coupé Controls and... Instruments an...  Instruments
The gauge -3- only works when the ignition is switched on. If there is less than 12 litres of fuel in the tank, the LED at the bottom of the dial will light up in red and the indicator lamp will appear link. The LED at the bottom of the dial will flash in red if the fuel level is very low.
The tank capacity of your vehicle is given in the Technical data section link.
CAUTION
Never run the tank completely dry. If there is an irregular fuel supply, misfiring can occur. Unburnt fuel can then enter the exhaust system. This can lead to overheating and damage to the catalytic converter.

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