Hello,
first check all fuses related.
Litronics have a complete different harness. Also the system has height sensors. The first question is if all components are in the car. Second question is if everything is wired correctly. Third question is if the ballasts work.
If the headlights don't adjust themselves (which makes a noise) if you turn them on, than there is something wrong with the front or rear level sensor or with the harness.
Also you can check if you have the extra connectors for the Litronic. To do that you have to remove the headlight with a 5 nut. If you have a complete Litronic wiring harness, there is a blue connector that sits at the back of the fender and is connected by pushing the headlamp into the fender. (Often the blue connectors are broken, because the headlights are pressed in with force – don't do that. The headlights should slide in without any force.) There is a second black connector that is plugged into the headlamp. The black connector is used for most of the Litronic adjusting functions.
I've added a chart i did that shows the blue connector wiring. Sorry, it's in german.
Blinker = indicator
Masse = ground
braun = brown
gelb = yellow
weiss = white
gelb = yellow
schwarz = black
grau = grey
grün = green
rot = red
Regards from Germany
Markus