Level adjustment is required by DoT with Xenon headlights.
That's why the adjuster is there it has HID. Some have auto ones, others have manual.
It is not required for Halogen headlights.
Whoever own ones with halogen can answer this better than me.
Page 5-60 of owner's manual if you have one.
I don't have a owners manual.
see attached.
leveling switch on the far left of dash