You do not need to fit the levellers as the car has "sport" suspension which is enough to keep it from bouncing around, or so I'm told. If you do fit them, then they must work but I've no idea how an MOT test can check them.
Where do you live? Different MOT requirements for Mainland UK vs Northern Ireland on washer jets.
Mainland: if fitted, they must work.
Mainland: if not fitted, then pass.
Northern Ireland: MUST have at least some water hitting them. For me, I have put a T pipe in my windscreen washers and run 2 pipes to each headlight. They each get a tear of water on them (as there's no pressure really) but that's enough to pass! Or just fit actual washers. Up to you.
Some people don't run the shutter wire to the CECM, but really, it's very easy to do and means when you use full beam on a country road, it doesn't block the xenon light to just a dipped beam any more but instead lights the road/hedges up immensely. I didn't do the cable for 6 months but when I did, I was cursing myself for not doing it sooner!