My car is now fixed.The coil(or manifold?) on the fifth cylinder was changed but after a quick test drive with the mechanic the yellow engine light lit again after pressing the engine at 5000 rpms.The car was connected again and the computer suggested the spark plug on the fifth cylinder to be changed as well.The spark plug didnt function properly because of bad fuel quality,the 100 octane was mixed with water or diesel.The mechanics,because something happened and the engine wouldnt start,connected with BMW AG Germany and directions were given on line by German mechanics!After that the engine started,i and the mechanic took the car again for a quick test drive and everything was ok.It is quite amazing the technology BMW has with servicing,finding problems with the car.The computer gives directions to the mechanics what to do for troubleshooting,they have not any initiatives.
Lastly,some software updates were available and installed.
I was told to continue break in the engine for the frst 2000 kms and change the first oil at 4000 kms.