Here's the simple method for adjusing vertical aim of HID lights.
1. Park on a flat level surface and measure the distance from the ground to the center of your headlight (bulb).
2. Make horizontal lines with a magic marker on a garage door or a light colored wall, at the same height from the ground/floor, that you measured in 1.
3. Now draw another line parallel to and 0.8" (20 mm) below the first line.
4. Park the car on a level surface so it is pointing squarely at the wall that you marked and with the headlights 10 feet from the wall.
5. Start the engine, make sure the self leveling cycles, then sitting in the drivers seat see where the lights hit the wall in relation to the lines.
5. Adjust the vertical aim of each light so that the bottom of the light pattern (cutoff) is at the level of the lower line that you marked in 3.
If you don't have a wall to mark, you can mark the same distances on a big piece of white cardboard and stand it up 10 feet in front of the lights and adjust to that.
If your lights shine below the mark in item 3, then they are too low and they should adjust them for you. The above procedure is from my IS300 service CD, but the measurements should work for any car since the measurements are based on the center height of the lights for the car being adjusted.