The easies way to determine whether a car has HID lights or not, is to switch them on.
HID take a second or two to flicker to life and about 30 seconds to get up to full brightness.
Its for this reason they are not suitable for main beams, as they don't "strike" fast enough.
The word "Xenon" is a noun, its the name of a gas, just like Neon, and Halogen.
Xenon is misused to describe headlight bulbs sold because the have the blue tinge that is typical of Xenon gas burning.
Some do indeed contain the gas, most are just Halogen bulbs with a blue painted coating on the outside.
Xenon is one of the gases used in the bulbs in HID lamps, thus the confusion.
Cars that are fitted with HID lights must by law, have properly constructed reflectors in the headlights and be E marked as such.
They work at a much higher voltage to cause the gas to strike, that is done by the exciter unit connected to the bulb.
As the gas inside the HID lamps is burning and forming a plasma to create the light source, this is much bigger than the thin line of hot wire in a conventional tungsten filament bulb, thus the shape of the reflector is very important, and is the reason they have a bulls eye projector type lens to focus the source.
OEM HID bulbs are made with bases that will not fit a normal headlight to stop them being used in non approved reflectors because the scatter is more likely to dazzle other drivers.
The makers of the conversion kits saw a way round this as a money making opportunity based on the appeal of these lights as fitted to high end models, and made the lamp units with bases that fit normal headlights. H4,H7,H1 etc....
They don't commit an offence by making them, the person who uses them, does.
The self levelling requirement is to prevent the lights from causing glare if the car is loaded at the rear, and the washers are supposed to ensure the lenses are clean to prevent scatter, personally I don't think the latter works.
If you take the whole lamp assembly from another model in the range and fit it with the self levelling units and control box, and the headlight washer, no problem.
Fit the conversion units and your asking for trouble and your a nuisance on the road, IMHO.