Save private wallbox in MBUX

Hello, I have already had the experience that my EQB is looking for a charging station, although I could easily reach my place where my wallbox hangs. For example: residual distance 80 km in the battery, 60 km remaining distance up to home – so fits. According to Navi, however, I have to interload to reach my place with at least 10%. The problem is that MBUX Navi does not know that I have a wallbox to house. I charge almost always to home, but spit off I did not find a point in the menu where I can teach the MBUX that a wallbox hangs to house. Even if I stand 20 meters in front of my house, the Navi tells me to continue driving 2 km, because there is a public charging station, there until 15% fully charge and then go home. It is also not possible to set the minimum loading condition at the destination with less than 10%. So far I have always ignored the navigation when I was sure that with the delusion It’s annoying, however, that the route is constantly adjusted and that new instructions are constantly coming, which differ from the actual route (since the Navi wants to go to the next public charging station). Ideally, the MBUX would have to recognize or learn that I arrive at the destination “at home” with e.g. 6% and then can charge there. Who knows advice? VG