Auto Levelling has a lot to do with the lights!
There is a sensor on both the front and rear to tell your lights weather to raise of lower.
1 issue i had with mine is that the arms on these sensors are only so long and are set to standard ride height. As your suspension moves up and down it adjusts the level of your lights. I had to adjust the levels of my lights as they were far too low after lowering the car due to this. (I actually ended up snapping the front arm because the car is that low and the arm is not long enough! Quick bracket made and its all fixed and works but you may have the same issue.) Not sure if anyone else lowered has had anything similar?