How do read the fuel gauge on a 1992 Volkswagon Cabriolet? on 1992 Volkswagen Cabriolet

The owners maunal says you have 1.8 gallons left at the red mark. I have no red mark on my guage. the lines and shaded areaS are hard to read.

Asked by for the 1992 Volkswagen Cabriolet
Do not let it go below 1/4 of a tank, the fuel pump is cooled by the fuel in the tank. If you let it get lower the pump could overheat and reduce the life of the pump.