2008 e70 35d stalling randomly
 

Started to have a few days ago some issue with random stalling the car 2008 e70 35d.

During first fault code reading I've got the following error messages:

1) On the first day:error message Injector, Cylinder 4 and 5, Activation, plus milions of K-line issues. Worked fine for some time and at the next morning starting the car it shutted off for multiple times.

2) Second Error reading on the next day gave error message for all 6 Injectors and a milion K-line related issues - found the root cause for K-line issues and fixed these issues to zero, were thinking that it is related somehow to this and issue is solved.

3) On the next day (third day), in the morning started, ran for 1 minute, stalled, started again and start driving, giving gas - stalled. Went to read the error codes, only Cylinder 5, Activation error message.
Did some live data reading for the injector values and according to the technician, these were perfect... Tried to unplug and plug in again the injector plugs, but probably there is no issue in the connectors?

Could there be some issue with the wiring or what else it could be? First issues started with very cold weather minus 17 degree celsius.