I should have mention this is an M Roadster. S54.
Here are the codes is throwing:
2D06 air mass system
29D1 Misfire, Cyl. 5
29CF Misfire, Cyl. 3
29CE Misfire, Cyl. 2
29CC Misfire, several Cyls
29D0 Misfire, Cyl. 4
They did a leak down test which came back with no findings. 3% or something...