Hello, I own 2014 Passat TDI SEL. Recently the fuel gauge has been acting weird. For example, when I started the car I got the low fuel light and then when I got on the highway the range went up as well as the fuel level. This happens when the car idles for a little and it begins to drop a little. After you start driving it rises to where it initially was. It is not very noticeable and the gauge is pretty accurate side from that little bug. What do you guys think?