There is a fault in the headlight leveling system and leveling has been disabled. Check the right hand lower control arm. There should be a sensor connected to it. Often, the sensor gets disconnected from the control arm or broken off completely which will put the leveling system in default mode.
If it looks OK, you will need to have the LSZ scanned to see what fault is present.
here is a picture of the assembly. M3 shown, non M similar.
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