Happened a few times now. Engine turns over strongly so battery seems ok but doesn't start. Come back a bit later and it starts straight away. I noticed the soft close doors don't work when this happens which makes we think something electrical that also kills the fuel pump. Got a load of codes on the reader including:
Motor control – 452A,4252, 41f2, 4b90, 49b8
ABS/DSC/Brake D36A,D36B,601D,601E
Instrument cluster A3c7, A54D, A554,
Heating AC - 9C4A
Systems – A06B, E18D, E18F

3.0SD E70 M Sport.
Z4MR E85