what could have happened is that while you were changing the suspension ( prolly changed the back i assume) the automatic headlight sensor leveling could have be changed. it happens. Here is the pic of the sensor :
What i suggest is you can go ahead and change the headlight level located in the back of the main headlamp housing. the pic had 2 nuts ( not sure what size) .One for high and one for low beam . However in my case i only have one nut( weird).
Any case go ahead and adjust either clockwise or counter-clockwise
Also i suggest you make sure have battery booster incase the battery dies because you will have turn the headlight on. Or engine running should be fine.
I my case i have removed that rod you see or the strut that tells the sensor the height of the car. Because mine was making noise and was well broken. the dealer doesnt just has that part instead you will have buy the entire sensor too..which is super$$$. so right now i dont have that rod but my lights still work and no error on the dash panel