with a failed crank position sensor the ECU will take quite a long time of cranking to register a fault of it.

Its not too bad to diagnose as the connector for it is not buried hidden in a cave like most cars, and its not too bad to change it either, its near the bell housing of the block (4 cyl only) - a DMM can test it if you rotate the engine slowly, its a simple hall effect switch.

the mode switch of the transmission (NSS) is pretty tricky and a pain too. I owned one and it would pop the check gearbox error if I shifted the lever quick when it was cold outside. Once warmed up it worked ok.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)