The height adjustment of the HIDs in the Audi TT is computer controlled (another example of German engineering overkill). There are sensors on the sway bars to determine the pitch of the car and adjust the headlights up and down to compensate for hills (a vertical version of the Tucker). I have see disputes of the consumer reports that they did not take this into account when measuring the distance.

I have been very happy with the light output. I have driven at my car to see the effect on other motorists, and didnt think it was much different. Other TT owners have complained that the factory height adjustment was too conservative and with a VAG interface, reprogrammed the trim without blinding oncoming cars.