Ok, so i tried a manual gearbox with holding 4,5,6,7,8,9 and 0 etc.
But now, i can't get a menu where you can set the key of the hazard blinking light thing.
Somebody can help me?

use the num pad it works

ok, thanks, too bad you can't change that to an other button, cause I would like to have it on my Momo as button

Use the logitech profiler software to map any keypress to a button

SD.