2013 CRD sometimes does not start without manual priming....

Hi everyone,

So I just got a 2013 CRD 190000km and since I got it a couple of times it didn't start without priming it manually the coil indicator light won't come on until I prime it, the car has had issues in the past with starting as I found a mechanic receipt in the paperwork that says ''Inspected vehicle for hard start when hot and loss of power, replaced fuel rail,o-rings,washers rocker cover kit, degreased, test drove ok'' this was from a couple of months back....

Got it on a diagnostic a couple of days ago injector values read ok, It had a couple of codes stored in the ECU for the fuel pump...

Sometimes it's hot sometimes cold, can sit for a couple of days and start no issues, today for example started in the morning first try after sitting for 2 days drove it around and now I had to go somewhere in the evening and it wouldn't start.... coil light didn't come on until I primed it , the starts first go...

Any ideas and help would me much appreciated...Thank you!