your problems sound like ignition coil failure if you get a hot start issue - generically, same for every other engine.

The lack or run and smell of gasoline is a case of no spark and the engine may start to sound like no compression (specially on anything larger than a 6 cyl) the gasoline leaks past the rings causing an oil washout and sometimes makes your engine feel such.

Your startup to a smell of rich gasoline burn smell is the gasoline in the exhaust cat converter igniting and being cleaned - it was collected when the engine was spinning with no spark - your cats would have been blazing hot at this time too. Best to drive it gently around the block and gun it hard a few times.

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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)