I did this on my N54 yesterday. You have to take off or at minimum loosen the intakes manifold to get to the last screw.
I did not drain coolant, I just shoved a rag in the hole as soon as I removed it.
Also, did anyone who has done this on the n54 replace their manifold gaskets? Dealer sold me those gaskets as well but I didn't swap them out...
M3 Ashtray, M3 Windshield Wash Fluid, M3 Seatbelt buckle...have I impressed you yet.....and all these modds are from the 2017 model M3....