Big job! requires retrofitting a HRA control module under pass floorboard and installing a large wiring harness to the l/f fuse box
as well as to all along the underdash area.
Not as bad as previous vehicles since you car allready has body sensors for height as part to the air suspension system.
Still pretty labor intensive job. I would plan on 2-3 thousand
dollars just to start.
Most people just put in the headlamp units and call it good.

Dr.D

p.s. I have a set of 220 s-class xenon lamp units. they could be for sale if interested. let me know.