Hello, is there no message if the disc cleaning liquid gets empty? Last time almost had to go home in blind flight because the liquid was all. Had only about 6-8 weeks ago the container, at least 7.5 L, fully filled up and thought that was enough for the rest of winter. Especially because of the xenon lamps a warning should appear, they should always be quite clean (wg. glare etc.), above all the car costs a few euros and “peeps” otherwise because of every little thing (gurt, light etc.).Does something have to be unlocked in the BSI? Thank you