yes they are illegal unless have self leveling and headlight washers.
BUT i have fitted hid to my k12 and beam pattern is as it should be. (not had complaints from other drivers)
Have hid's on other cars too with no problems. Only had bad beam pattern if not installed properly.
what type of hid have you got? there are h4 hi/low (same bulb does hi beam and low beam) or h4 low (these have hid low bulb with an extra bulb, halogen, for high beam)
8000k is ok, anything over 8000k is not really practical.