Further to the thread that I added on 21/09/24, of a friend’s experience with the OS and non starting: It was at the dealers for 4 weeks pending factory report etc. They have now got the car back but are none the wiser!.
Apparently MMC thought it may have been water getting in somewhere, but when the problem happened, it was dry and had been for some considerable time.
Think they are wishing they had kept their trad as with all the down-time since purchase, their confidence in the car has taken a severe blow.