[red-max]

My 2018 520d has developed an intermittent fault where it refuses to start.
The iDrive shows:

STOP Engine start not possible
Starting system failure. Call roadside assistance.

This has happened twice, and thankfully in both cases I have been able to start the car after shutting it off, locking it, unlock it, and attempting to start it again.

I don't think the battery is low (or shouldn't be) as I went on a 200+ mile journey only a week ago, with no problem. Admittedly the car has been sitting around less used than normal during the COVID19 lockdown.

I searched for these messages, and I don't get any hits, so looks like this isn't a common problem. I have the car booked in with the dealer next week, just wondered if anyone else has seen this problem, or has any advice if it happens again. The car is an automatic, so there's not much chance to bump-start it, or even roll it back/forwards.