C200 DIESEL 94, engine dies.

[est]

The problem is such, that C-klasse(202120) engine 601.013 stalls after being started in the morning while driving at the same telephone post The rubber gaskets at the fuel filter and the fuel filter were replaced but the stalling continues. After the morning stall engine is very hard to start. Once online again and warmed up everything is fine. My guess is that somewhere the air is sucked into the fuel line when cold. I assume that this could be the overflow valve at the injection pump. Maybe someone encountered this problem before. I was not able to find the answer in previous topics. Thanks ahead to everyone who is kind enough to share their experience with me .