Xenon headlight jiggle , late 97 SL 320 ( others too )

[97 SL320]

Has anyone worked on internal parts of auto leveling Xenon headlights? ( Hella brand )

Recently I've noticed when going over fine ripples the left headlight jitters up and down slightly. The right seems to move a bit as well, will pay more attention to it next time out. At this point I'm not sure if the autoleveling gear train is worn or the auto leveling system is overreacting.

Does the auto leveling have any built in diagnostic data?

Thanks