I tried so many things to tackle the bad cold start on my 2.5 CRD that imo the only possible causes left would be like some malfunctioning sensor (no error codes though..) or some common rail or injector problem.
Probably my car isn't economically worth expensive repairs like that any more but I'm curious what repairs like that might cost.
So anyone done Common Rail Fuel system diagnostics and what did it cost?
Or what would a revision of the injectors cost?

I found new injectors cost like €300 each so "Injector X 4 + Hourrates = too much"

 

Try a leakoff test of the four injectors first as its probably only one of them that's causing the pressure malfunction. First above all check leakoff at fuel rail pressure valve as it might just be there that your loosing pressure. I don't think it should leak at all there on start up.

 

I'll try to find a mechanic to do that for me..

I also read that if there's a leaking injector it most often is the #1 injector.. Could be true, but counted from the left or from the right?