Peugeot 407 SW sprint bad!

Hello, drive a Peugeot 407 SW Bj. 12/05. The vehicle has had difficulty starting since the last cold winter. It is as if he needed a kick in the rear so that he started. Then was with him in the workshop at Peugeot in Hilden (NRW) in March, which meant that the starter and also the battery were defect. I could not believe that and then I was still in another workshop and they told me that can not be, there is everything all right. It is only the battery he. Then I bought a new battery and a few days later it started again. Then I drove to a Hinterhoff workshop and they read out the car and meant that the diesel filter should be changed. It could be that it was dirty and not changed during the last inspection. Unfortunately, that was the way it was! In addition, the glow plugs were changed. He jumped on better too, only this powerless feeling was always noc What can that be? I didn’t have to worry about it for a long time and it was just so far that my wife didn’t come to work in the morning because he didn’t want to start anymore. I brought the battery away to recharge and look, he starts again. But again “LaLa”. Was then in a Bosch workshop, who noticed when reading out that the injection nozzles 2 and 3 have a mistake. At Peugeot they tell me that there is no error message and that there is no error. I don’t know if I can believe and trust anymore!! Would be great if the problem had finally been solved! I’m happy about every e-mail!