Thaank you for the help, after extensive testing we decided it was the fuel injectors. They were changed together with the spark plugs. The old ones had carbon deposits from rich mixture. Now the car drives fine again.

Hello to the comunity, The only place in the network to find some information about what the rail pressure should be after engine off, was this site - In the article about high pressure sensor testing in common rail diesels. My car is BMW petrol direct injеction and Im trying to diagnose intermitten...