[AKnowles]

If you have just the litronic upgrade, there is a small computer modules that is required for the self-leveling to work at all, but it only levels the lights when the car is turned on (not neccesarily started).

If you had factory Litronics, then, the slef-leveling works in real-time and uses small adjusters on the back of the lighting cradle (I think is where it is at) and attaches to the suspension.

And finally, if you plugged in Litronic lights with no module, there is no leveling action at all.