I would have somebody to check the error memory of the car and also to check online rail pressure values. The tech from Bosch service told me after some minutes what's wrong. The bill for having that checked is low. Then you can decide.

About the difficulty of the job: they had to remove the injectors and put them on a test stand. There they found out that 4 of the 6 were not in the proper value any more. Then they ordered repair sets and fixed all of them. Working time was about 8 hours. The rest was material.

LG Helmuth