My wife's car has been having similar symptoms. I replaced the 185,000 mile fuel pump no change. Checking the pressure it wasn't perfect so I'm thinking it's the FPR. Once it gets over the initial hard start it's fine. After sitting about 6-8 weeks took at least 8-10 cranks at least 8-10 seconds each.

The main candidates are crank sensor and FPR.

Money has been stupid tight with me getting half hours and wife's getting zero hours since mid March due to cv19 so I have not been able to order the parts yet though I did start it after a week of resting and it started after a long single crank.

I left the pressure gauge on and it did drop to 40 psi almost immediately and did not seem to hold add it's supposed to so primary culprit is FPR .

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)