They have to splice the AE wires into the side light wires, I watched Jimmypop do it to mine, I was gobsmacked at how easy it was, Now the question you have to ask is If a surgeon (Jimmypop) can read a bit of paper then follow the instructions and yet a BMW technician can't, do you trust them to do it properly.
Between us it it took about an hour tops start to finish to Remove bumper, remove old lights fit new lights and refit bumper.
Also remember the self leveling wires are now redundant and have no where to fit on the new lights, they need to tape them off.