mercedes benz c klass W204 2009 2.2 CDI starting problem

i have this problem and cann't solve it, when i'm starting car in the morning it starts normally on cold but when engine worm it have problems like this i was to tech but thay cann't find problem! thay programm engine computer, searching wire problems but nothing thay find please if uou have problems like this and if you solve it share please!