Are the auto raise/lower functions only on cars bought with xenons?
Yup.
And if you have AFLs, then the beams are automatically swiveled left and right too!

Each headlamp unit then needs three servo motors!
I know mine has a manual raise/lower but no automatic one since it doesn't have factory xenons.
Which makes it one of the crucial reasons why you can't put zenons on your car. Even if someone were to purchase the genuine OEM Xenon headlamps, they would still be illegal without all the other self-leveling gubbins.
And as for retro-fitting HIDs into halogen lamps, then this is illegal, even if you do fit all the auto-leveling.